Vendor Privacy Audit

Overview

GDPR Article 28(3)(h) requires that the processor "make available to the controller all information necessary to demonstrate compliance with the obligations laid down in Article 28, and allow for and contribute to audits, including inspections, conducted by the controller or another auditor mandated by the controller." This audit right is a cornerstone of the controller's accountability obligations and must be exercisable in practice.

The EDPB Guidelines 07/2020 (paragraph 110) emphasize that audit rights must be practical and exercisable, not merely theoretical. Controllers must develop structured audit programs proportionate to the risk of the processing.

At Summit Cloud Partners, the Vendor Privacy Audit Program provides a systematic approach to verifying processor compliance through on-site inspections, remote audits, and documentation reviews.

Audit Types

Type 1: Documentation-Based Audit (Remote)

Suitable for standard-risk vendors with current third-party certifications.

Aspect	Detail
Scope	Review of processor-provided documentation and certifications
Duration	3-5 business days
Frequency	Annual
Deliverable	Documentation Audit Report
Cost allocation	Controller bears own costs

Evidence Reviewed:

• Current ISO 27001/27701 certificates and audit reports
• SOC 2 Type II report (including management assertions and exceptions)
• DPA compliance self-assessment questionnaire
• Sub-processor register and DPA coverage confirmation
• Incident log summary for audit period
• Training records and confidentiality agreement coverage
• Data subject request handling metrics

Type 2: Remote Technical Audit

Suitable for standard-to-high-risk vendors where on-site access is not practical.

Aspect	Detail
Scope	Remote assessment including technical verification
Duration	5-10 business days
Frequency	Annual for high-risk; biennial for standard-risk
Deliverable	Remote Audit Report
Cost allocation	Per DPA terms (typically split)

Activities:

• All documentation review activities from Type 1
• Video-conference interviews with vendor privacy and security teams
• Screen-sharing walkthrough of access control configurations
• Review of logging and monitoring dashboards
• Live demonstration of data subject request handling process
• Review of encryption key management procedures
• Penetration test report review (vendor-provided under NDA)

Type 3: On-Site Inspection

Required for high-risk vendors and when triggered by compliance concerns.

Aspect	Detail
Scope	Physical inspection of processing facilities and controls
Duration	1-3 days on-site, plus pre/post work
Frequency	As needed; minimum biennial for highest-risk vendors
Deliverable	On-Site Inspection Report
Cost allocation	Per DPA terms

Activities:

• All remote audit activities
• Physical security inspection of data processing facilities
• Server room and network infrastructure walkthrough
• Badge access system review and testing
• Clean desk policy verification
• Environmental controls inspection (fire suppression, climate, power)
• Personnel interviews (privacy officer, security team, operations staff)
• Observation of operational procedures (incident response, change management)

Audit Planning

Pre-Audit Activities

60 Days Before Audit:

Activity	Responsible
Select vendors for audit based on risk tier and schedule	Privacy Team
Determine audit type (Documentation / Remote / On-Site)	Privacy Team Lead
Assign audit team lead and members	Privacy Team Lead
Notify vendor of audit intent per DPA notification requirements	Audit Team Lead

30 Days Before Audit:

Activity	Responsible
Issue formal audit notification letter to vendor	Audit Team Lead
Submit document request list to vendor	Audit Team
Schedule interview slots (for Type 2 and 3)	Audit Team
Book travel and facilities (for Type 3)	Operations
Prepare audit checklist customized for vendor's processing	Audit Team

7 Days Before Audit:

Activity	Responsible
Review vendor-provided documentation	Audit Team
Prepare interview question sets	Audit Team
Finalize on-site agenda (Type 3)	Audit Team Lead
Conduct team briefing	Audit Team Lead

Audit Checklist

A. DPA Compliance Verification

#	Check Item	Article	Evidence Required
A1	Processing limited to documented controller instructions	28(3)(a)	Processing logs, instruction register
A2	All authorized personnel bound by confidentiality	28(3)(b)	Signed confidentiality agreements, HR records
A3	Article 32 security measures implemented per DPA Annex II	28(3)(c)	Security configuration evidence
A4	Sub-processors authorized and DPAs in place	28(3)(d)	Sub-processor register, executed DPAs
A5	DSR assistance capability demonstrated	28(3)(e)	DSR handling procedures, response metrics
A6	Compliance assistance provided for Art. 32-36	28(3)(f)	DPIA contributions, breach investigation support
A7	Deletion/return capabilities verified	28(3)(g)	Deletion procedures, test results
A8	Audit information and access provided	28(3)(h)	Audit cooperation evidence

B. Technical Controls Verification

#	Check Item	Evidence Required
B1	Encryption at rest implemented per DPA specifications	Key management documentation, configuration screenshots
B2	Encryption in transit per DPA specifications	TLS configuration, certificate management
B3	Access controls configured per principle of least privilege	RBAC configuration, access review records
B4	MFA enabled for all administrative access	MFA enrollment records, policy configuration
B5	Logging enabled and retained per DPA retention period	Log storage configuration, sample logs
B6	Vulnerability scanning performed per schedule	Scan reports, remediation records
B7	Penetration testing performed per schedule	Pen test reports, finding remediation
B8	Backup and recovery procedures tested	DR test results, RPO/RTO metrics

C. Organizational Controls Verification

#	Check Item	Evidence Required
C1	Privacy training delivered to all relevant staff	Training records with completion dates
C2	Incident response plan documented and tested	IRP document, tabletop exercise records
C3	Change management process followed	Change log, approval records
C4	Physical security controls in place (Type 3 only)	Badge access logs, CCTV coverage, visitor log
C5	Data retention and deletion procedures operational	Retention schedule, deletion logs
C6	Records of processing maintained per Art. 30(2)	ROPA documentation

D. Breach Notification Readiness

#	Check Item	Evidence Required
D1	Breach detection capabilities operational	SIEM configuration, alert rules
D2	Breach notification procedure documented with DPA-compliant timeframe	IRP with notification section, contact matrix
D3	Breach notification contact details current	Verified contact information
D4	Breach register maintained	Breach log (redacted if necessary)

Finding Classification

Severity	Definition	Remediation Timeline	Follow-Up
Critical	Immediate risk to personal data or fundamental DPA violation	Immediate (within 7 days)	Verification audit within 30 days
Major	Significant gap in controls or DPA non-compliance	30 calendar days	Written evidence of remediation
Minor	Control weakness not immediately impacting data protection	90 calendar days	Verified at next scheduled audit
Observation	Area for improvement, not a compliance gap	Noted for next assessment	Tracked in audit records

Examples by Severity:

Severity	Example
Critical	Personal data accessible to unauthorized personnel; no encryption at rest despite DPA requirement
Major	Sub-processor engaged without notification; MFA not enforced for administrative access
Minor	Privacy training completion at 85% (target 100%); access review 2 weeks overdue
Observation	Incident response plan would benefit from more specific processor notification procedures

Remediation Tracking

All findings above Observation severity enter the remediation tracking system:

Field	Description
Finding ID	Unique identifier
Vendor	Processor name
Audit date	When finding was identified
Severity	Critical / Major / Minor
Description	Detailed description of the finding
Root cause	Why the gap exists
Remediation plan	Vendor's proposed corrective action
Deadline	Date by which remediation must be complete
Evidence required	What the vendor must provide to close the finding
Status	Open / In Progress / Remediated / Verified / Overdue
Verification method	How Summit Cloud Partners will verify remediation

Key Regulatory References

• GDPR Article 28(3)(h) — Audit rights and compliance information
• GDPR Article 5(2) — Accountability principle
• GDPR Article 24 — Responsibility of the controller
• GDPR Article 32 — Security of processing
• EDPB Guidelines 07/2020 — Controller and processor concepts (paragraph 110 on practical audit rights)
• Bavarian DPA (BayLDA) — Processor Audit Guidelines (2022)
• ISO 19011:2018 — Guidelines for auditing management systems