Agentic Commerce Dispute Evidence: Audit Trails for AI Purchases
Learn why agentic commerce needs better dispute evidence, how AP2 and Verifiable Intent create audit trails, and what merchants should log.
Updated May 25, 2026
Agentic commerce dispute evidence is the record proving what the user authorized, what the agent requested, what the merchant returned, what payment was approved, and what was fulfilled. As agents gain buying authority, merchants and payment providers need audit trails that explain transactions without relying on guesswork.
Why disputes change with AI agents#
Classic ecommerce has a visible human click. Agentic commerce may not. The user may give a high-level instruction, the agent may interpret it, and the purchase may happen later within a policy.
That creates new dispute questions:
- Did the user authorize this category?
- Did the agent stay within budget?
- Did the merchant change the cart?
- Was the payment bound to the final cart?
- Was the user present or not present?
- Was delivery completed?
AP2 and Verifiable Intent both focus on making intent and authorization provable.
Evidence layers#
| Layer | Evidence needed |
|---|---|
| User instruction | What the user allowed |
| Agent action | What the agent requested |
| Merchant response | Cart, price, fees, terms, and availability |
| Payment authorization | Payment mandate or credential evidence |
| Fulfillment | Shipment, delivery, refund, return state |
| Policy decision | Why merchant accepted, rejected, or escalated |
This connects to agentic authentication and agentic wallets.
AP2 and mandates#
AP2 documentation describes checkout mandates and payment mandates as verifiable digital credentials. The key idea is that the system can preserve a cryptographic record of intent, cart, and payment authorization.
That does not remove all disputes. It changes the evidence standard. Instead of asking who clicked, the ecosystem can ask what was authorized and whether the transaction matched it.
Mastercard Verifiable Intent#
Mastercard describes Verifiable Intent as a trust layer that links identity, intent, and action in a privacy-preserving record. It is designed to provide proof that users, merchants, and issuers can rely on if something goes wrong.
For merchants, that means dispute readiness starts before payment capture. It starts when intent and cart terms are formed.
Merchant logging checklist#
- Agent identity or source.
- User authorization reference.
- Intent scope and constraints.
- Cart line items, taxes, shipping, and fees.
- Price validity timestamp.
- Payment authorization reference.
- Policy decision and reason code.
- Fulfillment status.
- Return and refund events.
- Support contacts and escalations.
The merchant agent policy engine guide explains policy logging.
FAQ#
Are agentic commerce disputes only payment disputes?#
No. They can involve wrong products, misinterpreted intent, delivery failures, refund disagreement, loyalty mismatch, or unauthorized delegation.
Can AP2 prevent chargebacks?#
No protocol prevents all disputes. AP2 can improve the evidence trail for authorization and accountability.
Why does Verifiable Intent matter?#
It provides a tamper-resistant record of what the user authorized and how the agent acted, which can support trust and dispute resolution.
What should merchants log first?#
Start with intent reference, cart contents, price validity, payment authorization, policy decision, and fulfillment status.
Sources#
Primary sources: AP2 documentation, Google AP2 donation to FIDO, Mastercard Verifiable Intent, and FIDO trusted AI agent standards.