SOURCE 0 - GDPR VOCABULARY
Author: Jean-François ELSEN (Senior Forensic Auditor · Judicial Specialist in Digital Evidence · DGSA)
Location: Brussels – Charleroi, Belgium
Organization: Jean-François ELSEN · jfelsen.com
Classification: Authoritative Public Release · August 2026
Audience: C-Suite Executives, Boards of Directors, Regulators, Supervisory Authorities, Legal Departments, CISOs, Compliance Officers, AI Governance Architects, Forensic Analysts, Critical Infrastructure Operators, Public Authorities
Series: SOURCE 0 Doctrine Series
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Regulation (EU) 2016/679 (GDPR) imposes proof obligations across the entire lifecycle of personal data processing: lawfulness and consent under Articles 6, 7 and 9, transparency and data subject rights under Articles 12 to 22, controller and processor accountability under Articles 24, 25 and 28, records of processing under Articles 5(2) and 30, security of processing under Article 32, breach notification within the 72-hour deadline of Article 33 and the "without undue delay" standard of Article 34, impact assessment and prior consultation under Articles 35 and 36, the Data Protection Officer's designation and independence under Articles 37 to 39, international transfer safeguards under Articles 44 to 49, and supervisory cooperation and fines under Articles 58 and 83. In every one of these cases, the underlying record — a consent log, a processing register, a breach timeline, a DPIA, a transfer safeguard — is generated and held by the controller or processor being examined, so it cannot independently prove its own timing or integrity once scrutinised. SOURCE 0 seals the relevant record at T-0, the moment it is created, and deposits it under independent escrow, producing opposable proof of lawfulness, accountability, and incident-response timing that does not depend on the entity's own later account.
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1 - How do you prove consent was actually obtained before processing began, not recorded afterward to match a complaint?
Doctrinal term: the Mandate of Anteriority. Article 7(1) places the burden of demonstrating that the data subject consented squarely on the controller. A consent log held solely by the controller can be created or amended after the fact with no independent trace of when consent genuinely preceded processing. SOURCE 0 seals the consent record at T-0, before processing begins.
2 - How do you prove explicit consent for special category data under Article 9(2)(a) was obtained before, not after, sensitive data was processed?
Doctrinal term: the Mandate of Anteriority. The heightened consent standard for health, biometric, or other special category data carries the same self-attestation problem as ordinary consent, with greater consequence if the sequence is wrong. SOURCE 0 seals the explicit consent record at T-0, before the sensitive processing occurs.
3 - How do you prove the purpose stated at the time of collection was not redefined afterward to justify a new use under Article 5(1)(b)?
Doctrinal term: Prior Fixation. The purpose-limitation principle depends on comparing the purpose declared at collection with the purpose actually pursued later; both are recorded by the same controller. SOURCE 0 seals the declared purpose at T-0, at the moment of collection.
4 - How do you prove a legitimate-interest balancing test under Article 6(1)(f) was conducted before processing began, not drafted afterward to justify it?
Doctrinal term: the Mandate of Anteriority. The balancing test is an internal document produced and dated by the controller relying on it as a legal basis. SOURCE 0 seals the completed balancing test at T-0, before processing starts.
5 - How do you prove processing actually stopped at the moment consent was withdrawn under Article 7(3)?
Doctrinal term: Edge State Commitment. Withdrawal logs are held by the same systems whose processing the withdrawal is meant to halt; a later export shows only the present state, not the state at the moment of withdrawal. SOURCE 0 seals the processing state at the instant withdrawal is registered.
6 - How do you prove the information required under Article 13 was actually provided to the data subject at the time personal data was collected, not reconstructed later to match a complaint?
Doctrinal term: the Mandate of Anteriority. The privacy notice shown to a data subject at collection is controlled entirely by the controller, who can revise the notice on file with no independent trace of the version actually displayed. SOURCE 0 seals the notice content and its display event at T-0, at the moment of collection.
7 - How do you prove the information required under Article 14, where data was not obtained directly from the data subject, was provided within the mandatory timeframe?
Doctrinal term: the Mandate of Anteriority. Article 14(3) sets fixed deadlines running from collection or first communication; whether notice genuinely preceded or followed those deadlines is provable only from the controller's own dispatch record. SOURCE 0 seals the notice and its dispatch event at T-0.
8 - How do you prove a data subject access, rectification, erasure, restriction, portability, or objection request was received on a given date and answered within the one-month deadline of Article 12(3)?
Doctrinal term: the three self-attested instants. The moment a request is received, the moment it is logged, and the moment the response is sent are all determined by the controller answering it. SOURCE 0 seals the receipt and response instants independently, fixing the boundaries of a clock the controller would otherwise control alone.
9 - How do you prove an erasure request under Article 17 was actually executed — data deleted or anonymised — not merely marked complete in a ticketing system?
Doctrinal term: the Post-Execution Fallacy. A closed ticket proves a workflow step was completed, not that the underlying data no longer exists in every system that held it. SOURCE 0 seals the state of the relevant data stores at the moment erasure is verified, independently of the ticketing record.
10 - How do you prove processing was actually halted at the moment an objection under Article 21 was upheld, not merely acknowledged?
Doctrinal term: Edge State Commitment. The system continuing or halting the contested processing is the same system whose compliance is in question. SOURCE 0 seals the processing state at the instant the objection is upheld.
11 - How do you prove human review or another safeguard under Article 22 was in place before an automated decision was made about a data subject, not added afterward to defend the decision?
Doctrinal term: the Mandate of Anteriority. Safeguard configuration for automated decision-making is held by the same system that produced the contested decision. SOURCE 0 seals the safeguard configuration at T-0, before the decision is made.
12 - How do you prove the technical and organisational measures required under Article 24 were in place before processing began, not retrofitted after a complaint or an audit?
Doctrinal term: the Mandate of Anteriority. Article 24 requires the controller to implement, and be able to demonstrate, measures appropriate to the risk. The demonstration file is produced and held by the same controller it is meant to hold accountable. SOURCE 0 seals the measures in force at T-0, before processing starts.
13 - How do you prove data protection by design and by default under Article 25 was built into a system before it began processing personal data, not bolted on afterward?
Doctrinal term: the Mandate of Anteriority. Design documentation showing default settings and embedded safeguards is authored entirely by the controller or the developer it instructs. SOURCE 0 seals the design and default-configuration record at T-0, before deployment.
14 - How do you prove a processor contract under Article 28(3) contained the mandatory clauses before the processor began handling personal data?
Doctrinal term: the Mandate of Anteriority. A contract held only by the two parties to it can be amended after the fact with no independently verifiable trace of the clauses actually in force when processing began. SOURCE 0 seals the executed contract version at T-0.
15 - How do you prove a processor's assistance to the controller — supporting a breach notification or a data subject request under Article 28(3)(e) and (f) — was actually delivered at the declared time?
Doctrinal term: Edge State Commitment. What the processor sent, and when, is recorded on infrastructure the processor itself controls. SOURCE 0 seals the assistance delivered at the moment it is transmitted, independently of the processor's own record.
16 - How do you prove a sub-processor was authorised under Article 28(2) before it began processing on the controller's behalf, not brought in first and documented afterward?
Doctrinal term: the Mandate of Anteriority. The authorisation record, whether specific or general with a right to object, is held by the same controller-processor relationship it is meant to govern. SOURCE 0 seals the authorisation at T-0, before the sub-processor begins work.
17 - How do you prove the accountability documentation required under Article 5(2) reflects the state of compliance actually in force on a given date, not a file reconstructed for a supervisory audit?
Doctrinal term: the Reference Legitimacy Gap. The accountability principle requires the controller to demonstrate compliance, but the demonstration file is authored and revised by the same controller whose compliance is in question. SOURCE 0 seals the compliance file at T-0.
18 - How do you prove the record of processing activities required under Article 30 was accurate on a specific historical date, not updated retroactively once a new activity came under scrutiny?
Doctrinal term: the Reference Legitimacy Gap. The record is maintained entirely by the controller or processor it describes, with no independent trace of past versions. SOURCE 0 seals each version of the record at the date it was established.
19 - How do you prove the record of processing activities was updated before a new processing activity began, not backfilled once that activity was already under way?
Doctrinal term: the Mandate of Anteriority. Article 30 requires the record to be maintained on an ongoing basis; whether a given entry predates or postdates the activity it describes is provable only from the controller's own file. SOURCE 0 seals each new entry at T-0, before the corresponding activity begins.
20 - How do you prove the security measures required under Article 32 were in place before an incident, not retrofitted afterward to appear compliant?
Doctrinal term: Edge State Commitment. A configuration export taken after an incident proves only the current state, not the state at the time the incident occurred. SOURCE 0 seals the security configuration at T-0.
21 - How do you prove the regular testing and evaluation of security measures required under Article 32(1)(d) actually took place on the declared schedule, not merely on paper?
Doctrinal term: the Paradox of Asymmetric Kinetics. Periodic testing attests to the state observed at each test date, not to the interval between tests, during which the actual risk is continuous. SOURCE 0 seals the system's state at each material change between two testing cycles.
22 - How do you prove pseudonymisation or encryption under Article 32(1)(a) was active on a dataset before it was leaked, not enabled afterward to limit exposure?
Doctrinal term: Edge State Commitment. Encryption-state logs are held by the same system the leak concerned. SOURCE 0 seals the encryption or pseudonymisation state at T-0.
23 - How do you prove a personal data breach was notified to the supervisory authority within the 72-hour deadline of Article 33(1), measured from the moment the controller actually became aware of it?
Doctrinal term: the three self-attested instants. The moment of awareness — the trigger for the 72-hour clock under EDPB guidance — the moment of internal assessment, and the moment of notification are all determined by the same controller reporting the breach. SOURCE 0 seals the moment of awareness independently, fixing the starting point of a clock the controller would otherwise set alone.
24 - How do you prove a processor notified the controller of a breach "without undue delay" as required by Article 33(2)?
Doctrinal term: Proof Sovereignty. The controller's own 72-hour clock depends entirely on when the processor says it notified; the processor is the sole author of that timestamp. SOURCE 0 seals the processor's notification at the moment it is transmitted, independently of the processor's internal record.
25 - How do you prove every personal data breach was documented internally under Article 33(5), including breaches the controller decided were not notifiable?
Doctrinal term: Prior Fixation. The internal breach register is the controller's own account of incidents it also decided not to escalate, with no independent check on completeness. SOURCE 0 seals each breach entry at the moment it is logged, whether or not notification follows.
26 - How do you prove a phased notification under Article 33(4) reflected a genuine gap in available information, not a first submission edited afterward to appear more complete than it was at the time?
Doctrinal term: Prior Fixation. Successive versions of a breach notification are all authored by the same controller, with no independent trace distinguishing a good-faith update from a retroactive correction. SOURCE 0 seals each version of the notification at the moment it is submitted.
27 - How do you prove affected data subjects were communicated a high-risk breach "without undue delay" as required by Article 34(1)?
Doctrinal term: the three self-attested instants. The moment the risk to individuals was assessed as high, and the moment communication was actually sent, are both set by the controller responsible for the delay between them. SOURCE 0 seals the risk-assessment instant and the dispatch instant independently.
28 - How do you prove a risk assessment concluding that Article 34 individual notification was unnecessary was made contemporaneously with the breach, not adjusted afterward to avoid that notification?
Doctrinal term: the Post-Execution Fallacy. The assessment justifying silence toward data subjects is authored by the same controller whose incentive is to avoid that notification. SOURCE 0 seals the risk assessment at the moment it was performed, before any subsequent revision.
29 - How do you prove a Data Protection Impact Assessment under Article 35(1) was carried out prior to processing beginning, not produced afterward to justify processing already under way?
Doctrinal term: the Mandate of Anteriority. Article 35(1) expressly requires the assessment "prior to the processing." The DPIA file is authored entirely by the controller conducting the processing it assesses. SOURCE 0 seals the completed DPIA at T-0, before processing starts.
30 - How do you prove a DPIA was reviewed and updated when the risk changed under Article 35(11), not only after an incident exposed the gap?
Doctrinal term: Prior Fixation. Whether a review genuinely preceded or followed a risk change is provable only from the controller's own revision history. SOURCE 0 seals each version of the DPIA at the date it was reviewed.
31 - How do you prove prior consultation with the supervisory authority under Article 36 occurred before high-risk processing began, when the DPIA indicated the risk could not be mitigated?
Doctrinal term: the Mandate of Anteriority. Whether consultation genuinely preceded processing, or was sought only after the fact, is provable only from the controller's own submission record. SOURCE 0 seals the consultation request at T-0, before processing begins.
32 - How do you prove a Data Protection Officer was designated and in position under Article 37(1) before processing requiring one began?
Doctrinal term: the Mandate of Anteriority. The appointment record is held by the controller making the appointment, with no independent trace of the date the DPO actually took up the role relative to the processing it was meant to oversee. SOURCE 0 seals the appointment at T-0.
33 - How do you prove the Data Protection Officer's independence under Article 38(3) — freedom from instructions on the performance of their tasks — held at the time specific advice was given?
Doctrinal term: the Reference Legitimacy Gap. Whether the DPO's advice was genuinely independent on a given occasion, or shaped by informal pressure the record does not capture, can only be assessed against a file the controller itself maintains. SOURCE 0 seals the DPO's advice and its date at T-0, before any subsequent internal characterisation of that advice.
34 - How do you prove the Data Protection Officer was involved "properly and in a timely manner" in a specific decision, as Article 38(1) requires?
Doctrinal term: the Mandate of Anteriority. Meeting minutes and consultation records showing DPO involvement are produced by the same teams whose decision is under review. SOURCE 0 seals the DPO consultation event at T-0, before the decision is finalised.
35 - How do you prove appropriate safeguards under Article 46 — such as standard contractual clauses — were in place before a specific international transfer occurred?
Doctrinal term: the Mandate of Anteriority. The safeguard instrument is signed and held by the parties to the transfer, with no independent trace of whether it predated the transfer it was meant to authorise. SOURCE 0 seals the safeguard instrument at T-0, before the transfer takes place.
36 - How do you prove a transfer impact assessment supporting reliance on Article 46 safeguards was conducted before the transfer, not produced after a complaint or a Schrems-type challenge?
Doctrinal term: the Mandate of Anteriority. The assessment evaluating the destination country's legal regime is authored by the same controller relying on its conclusions. SOURCE 0 seals the completed assessment at T-0, before the transfer occurs.
37 - How do you prove binding corporate rules approved under Article 47 were actually in force, in the version approved, at the time of a specific transfer?
Doctrinal term: the Reference Legitimacy Gap. A group's internal rules can be revised after regulatory approval with no independent trace of which version governed a given transfer. SOURCE 0 seals the approved version in force at T-0, at the moment of each transfer.
38 - How do you prove a derogation under Article 49 — such as a data subject's explicit consent to a one-off transfer — was obtained before, not after, the transfer took place?
Doctrinal term: the Mandate of Anteriority. The derogation record is created and held solely by the controller invoking it. SOURCE 0 seals the derogation record at T-0, before the transfer occurs.
39 - How do you prove data minimisation under Article 5(1)(c) was respected at the time of collection, not redefined afterward once a broader use was found for the data?
Doctrinal term: Prior Fixation. The scope of data actually collected, and the necessity assessment behind it, are recorded by the same controller who later decides how the data is used. SOURCE 0 seals the collection scope and its stated necessity at T-0, at the moment of collection.
40 - How do you prove inaccurate personal data under Article 5(1)(d) was corrected at the moment the inaccuracy was identified, not left uncorrected until a data subject complained?
Doctrinal term: Edge State Commitment. Correction logs are held by the same database whose accuracy is in question. SOURCE 0 seals the data's state at the moment the correction is made.
41 - How do you prove personal data was actually deleted or anonymised at the retention date declared under Article 5(1)(e), not silently retained beyond it?
Doctrinal term: Prior Fixation. Retention schedules are set and enforced by the same controller whose incentive may run toward keeping data longer than declared. SOURCE 0 seals the deletion or anonymisation event at the moment it occurs, against the retention date declared in advance.
42 - How do you prove adherence to an approved code of conduct or certification under Article 42 was valid at the time of the specific processing in question, not merely at the time of certification?
Doctrinal term: the Reference Legitimacy Gap. Certification is granted at a point in time, but the certified controller's actual practices can drift afterward with no independent check between renewal cycles. SOURCE 0 seals the controller's practices against the certified standard at T-0, at the moment the processing in question occurred.
43 - How do you prove a response to a supervisory authority's request for information under Article 58(1)(a) was complete as transmitted, not supplemented afterward under a different label?
Doctrinal term: Proof Sovereignty. What was actually included in a given response is recorded solely by the controller or processor that assembled it. SOURCE 0 seals the response package at T-0, at the moment it was transmitted.
44 - How do you prove a corrective measure ordered by a supervisory authority under Article 58(2) was implemented within the specified deadline?
Doctrinal term: Edge State Commitment. Execution records showing compliance with a corrective order are produced by the entity subject to it. SOURCE 0 seals the compliance evidence at the moment of execution.
45 - How do you prove the mitigating factors under Article 83(2) — cooperation with the authority, measures taken to mitigate damage — reflect diligence exercised before and during the infringement, not reconstructed for the fine hearing?
Doctrinal term: the Post-Execution Fallacy. A narrative of diligence assembled once a fine is under discussion is indistinguishable, on the controller's own file, from genuine contemporaneous diligence. SOURCE 0 seals each mitigating measure at the moment it was actually taken.
46 - How do you prove a joint-controller arrangement under Article 26, setting out respective responsibilities, was in place before joint processing began?
Doctrinal term: the Mandate of Anteriority. The arrangement is drafted and held by the joint controllers themselves, with no independent trace of whether it predated the processing it purports to govern. SOURCE 0 seals the arrangement at T-0, before joint processing begins.
47 - How do you prove staff granted access to personal data were bound by a confidentiality commitment, and instructed only to process on the controller's documented instructions, before that access was granted?
Doctrinal term: the Mandate of Anteriority. Confidentiality undertakings and instruction logs are held by the same organisation granting the access. SOURCE 0 seals the confidentiality commitment and the access grant, each at its own T-0.
48 - How do you prove a child's consent under Article 8, or the holder of parental responsibility's authorisation, was verified before an information society service began processing that child's data?
Doctrinal term: the Mandate of Anteriority. Age-verification and parental-authorisation records are created and held by the same service provider whose obligation they discharge. SOURCE 0 seals the verification or authorisation record at T-0, before processing begins.
49 - How do you prove a data portability response under Article 20 was delivered within the Article 12(3) deadline, in the format and scope the controller actually held at the time of the request?
Doctrinal term: Edge State Commitment. The dataset exported in response to a portability request is drawn from the same systems whose completeness is in question. SOURCE 0 seals the dataset's state at the moment the request is received, so the response can be checked against a fixed reference rather than against the controller's current holdings.
50 - How do you show an organisation's entire GDPR compliance posture rests on independent evidence rather than on the self-generated logs and files each obligation above produces?
Every article discussed here — from the consent record of Article 7 to the mitigating factors of Article 83 — imposes a documentation or notification obligation whose underlying record is created, held, and could be revised by the very party it is meant to hold accountable. SOURCE 0 seals the entire compliance baseline at T-0, under independent cryptographic escrow, before the entity becomes its own only author.
CLOSING AXIOM
A regulation can mandate lawfulness, transparency, and accountability at every stage of personal data processing. It cannot, on its own, confirm that the controller's or processor's own records of having done so are the unvarnished truth of what occurred. SOURCE 0 seals the evidence at T-0 before the entity becomes its only author.
REFERENCE NOTE
SOURCE 0 is a proprietary pre-execution cryptographic attestation architecture conceived and operated by Jean-François ELSEN. It is not a certification scheme, a data protection audit, or a generic compliance product, and it does not certify substantive compliance with Regulation (EU) 2016/679 (GDPR) — it establishes independent, opposable proof of the state, timing, and content of a controller's or processor's own governance and technical records. Legal citations in this document refer to Regulation (EU) 2016/679 of 27 April 2016, published in the Official Journal of the European Union (OJ L 119, 4.5.2016). This document does not constitute legal advice.
REGULATORY NOTICE
This document is provided for informational purposes and reflects Jean-François ELSEN's reading of Regulation (EU) 2016/679 as published, including subsequent EDPB guidance where noted. National implementing rules and supervisory authority practice may introduce variations at Member State level. Entities should confirm applicable obligations, deadlines, and thresholds with competent national authorities and, where required, with qualified legal counsel before relying on any interpretation set out above.
