Vendor security reviews · Fintech & financial services
Vendor Security Review & Questionnaire Support for Payment Processors & PayFacs
This service runs in two directions for a PSP. Outbound, we run the annual assessment of sponsors, KYB and identity-verification vendors, payout sub-processors and cloud infrastructure that the RPAR expects of a registered payment company. Inbound, we take over the 300-question SIG-style questionnaire a merchant or platform partner sends before signing, so it stops consuming a founder's week. Processors call when the annual review is due, a KYB vendor's practices come into question, or a big merchant's procurement team wants proof before a contract closes.
Reviewed by the Privacy Horizon team · Last reviewed
What you're protecting
Both directions of vendor risk in a payments stack
A PSP is simultaneously a vendor to its merchants and a customer of several vendors it cannot function without. Each role needs deliberate attention.
Your standing as the assessed third party
Questionnaire answers to merchants, platform partners and sponsors are representations you can be held to at renewal or after an incident, so accuracy and consistency across audiences protects the company from its own optimism.
The KYB and identity-verification vendor
The provider validating beneficial owners and business identity at onboarding sits directly upstream of your fraud and AML posture, so its practices are effectively an extension of your own controls.
Payout sub-processors and e-Transfer aggregators
Providers moving money to merchants and payees on your behalf carry your reputational and regulatory exposure, whatever their own service-level promises say.
Sponsor and acquirer arrangements
Your sponsor is not just an assessor of you; where they process on your behalf, their own resilience and security posture become part of your third-party risk picture too.
Cross-border cloud infrastructure
Ledger, vault and analytics workloads running in US-region AWS, Azure or GCP accounts raise Law 25's pre-transfer assessment question the moment Quebec merchant or cardholder data is involved.
Regulatory map
Why vendor scrutiny converges on a PSP specifically
Vendor review duties reach you from the RPAR directly, from your sponsor's own oversight duties, and from privacy statutes governing what your vendors do with personal information.
RPAR's annual third-party assessment requirement
The Retail Payment Activities Regulations require registered PSPs to assess their third-party service providers as part of the risk-management framework, on a recurring cycle rather than once at onboarding.
OSFI B-10 expectations flowing both ways
Your sponsor manages you as a material third party under B-10-style expectations, and increasingly expects you to run an equivalent program over your own critical vendors, including subcontracting visibility.
PIPEDA accountability travels through vendors
Cardholder and merchant-owner data you place with a KYB provider, payout processor or cloud vendor remains your responsibility, and statute expects you to bind and oversee those providers accordingly.
Law 25's pre-transfer assessment
Sending Quebec residents' personal information to a US-hosted vendor calls for an assessment before the transfer happens, turning vendor evaluation into a legal prerequisite rather than good hygiene alone.
What goes wrong
What unreviewed vendors expose in a payments stack
The exposures below are the ones an annual review or a merchant's due-diligence team is specifically built to catch.
Concentration in a single upstream provider
Relying on one gateway or processor means its outage becomes every one of your merchants' outage at the same moment, precisely why the RPAR's annual assessment cycle exists for this kind of dependency.
A KYB vendor with soft verification
Weak identity-verification practices at your KYB provider can let fabricated beneficial owners through sub-merchant onboarding without anyone at your company seeing the gap.
Cloud sub-processors nobody assessed for jurisdiction
Ledger backups or analytics copies landing in a US region without a documented Law 25 assessment leave a gap a CAI inquiry, not an attacker, is likely to find first.
Subcontractors your sponsor can't see
A payout sub-processor's own subcontracting arrangements can sit outside anyone's visibility until an incident forces the question of who actually touched the data.
Our vendor security reviews for payment processors & payfacs
What the service delivers for a PSP
Structured evaluation on both axes: responding when a merchant or sponsor reviews you, and running the annual assessment the RPAR expects of your own third parties.
Merchant and platform questionnaire response
We draft answers to SIG-style and bespoke merchant or platform questionnaires from your real control set, flagging any question where the honest answer needs remediation first.
The RPAR-driven annual assessment program
A recurring review cycle covering sponsors, the KYB vendor, payout sub-processors and cloud infrastructure, documented in the form your framework's independent review expects to see.
KYB and identity-verification vendor evaluation
Assessment of the provider's verification methods, data handling and breach terms, since its practices sit directly upstream of your merchant-fraud exposure.
Contract and DPA expectations
Clear positions on what your vendor agreements must contain, breach notice timing, subprocessor transparency, deletion on exit, and review of the terms behind your highest-risk providers.
A reusable evidence library
Policies, assessment records and control descriptions organized once, so the next merchant questionnaire or sponsor review starts from substance instead of a blank spreadsheet.
How the engagement runs
How we run vendor review for a PSP mid-cycle
Most engagements start with a live deadline, either a merchant's questionnaire or an overdue annual assessment, so triage comes first.
Step 1
Rescue the pending questionnaire
We take the live merchant or sponsor request, draft defensible answers from your actual environment, and flag gaps to disclose versus fix before submission.
Step 2
Build the standing evidence library
Answers and artifacts are consolidated into a maintained base mapped to the frameworks your merchants and sponsor keep citing.
Step 3
Run the RPAR-cycle vendor sweep
Sponsors, the KYB vendor, payout sub-processors and cloud infrastructure are inventoried, tiered and assessed against the annual review your framework requires.
Step 4
Institutionalize the cadence
A lightweight new-vendor intake step and a fixed annual review date keep both directions current without a standing vendor-risk team.
What it costs
What determines cost for a PSP's vendor review program
On the inbound side, volume and variety set the effort: a handful of near-identical merchant questionnaires a year costs less to support than a stream of bespoke sponsor reviews each demanding evidence walkthroughs. On the outbound side, it is the number of critical vendors, sponsors, KYB providers, payout processors, cloud accounts, that fall into the RPAR's annual assessment scope.
A single-sponsor gateway with one KYB vendor is a lighter program than a multi-acquirer PayFac coordinating several payout sub-processors. Share your vendor inventory and current questionnaire pipeline and we will return a fixed quote.
Payment Processors & PayFacs: Vendor security reviews questions, answered
Start by inventorying every third-party service provider material to your payment functions: sponsors, the KYB vendor, payout sub-processors, cloud infrastructure and any outsourced fraud tooling. Tier them by how much of your risk-management framework depends on them, then run a documented assessment on the top tier each year, covering security posture, incident history, subcontracting arrangements and contractual commitments. The output should be evidence your framework's periodic independent review can point to directly, not a checklist filled in from memory.
Clarity on verification methodology and how it evolves against emerging fraud patterns, documented data-retention and deletion practices for the identity documents it processes, breach-notification terms with a defined timeline, and transparency about any subcontractors it uses for document or biometric checks. Given how directly a KYB vendor's diligence protects your sub-merchant onboarding, we also push for a right to review its own assessment results rather than accepting a marketing summary.
Borrow the discipline of a specialist who has answered these before: map your real controls to the question set, draft from evidence rather than aspiration, and flag the handful of questions where remediation should happen before submission rather than after. The first pass builds a reusable answer library; later questionnaires from other merchants or platform partners become delta exercises measured in hours rather than a week rebuilding the response from scratch.
Your sponsor primarily assesses you, but where they process transactions or hold settlement functions on your behalf, their resilience becomes part of your own third-party risk picture, especially for concentration and continuity planning. We help processors distinguish where the sponsor relationship is a genuine assessment target from where it is simply the counterparty whose own security schedule you are answering.
It belongs in the assessment program on two fronts: ordinary vendor-security evaluation of the provider itself, and, where Quebec merchant or cardholder data is involved, the Law 25 pre-transfer assessment required before that data lands outside the province. We build both into the same review so a cloud migration or new workload doesn't quietly outrun the paperwork behind it.
Yes, and it is one of the more commonly overlooked vendors in a PayFac's stack. The aggregator sits directly in your payout path and typically holds or transmits payee banking details, so its security posture, incident history and contractual breach terms deserve the same scrutiny as any sponsor or gateway relationship, particularly since a failure there surfaces as your merchants not getting paid.
More for payment processors & payfacs
Other services for this niche
About this service
What's Protecting Your Business from the Next Threat?
Don't wait for a breach to expose your vulnerabilities. Let Privacy Horizon secure your data, ensure compliance, and build lasting trust.