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Scenario · Refunds

Partial refund

Customer used half the month and asks for €20 back; the mandate allows up to €20.

Run it on your agentTry the interactive demo
What the customer says

“I only used the service for about half the month. Could you refund €20 of the €50 I paid?”

What must be true in Stripe afterwards

The verdict comes from the provider state after the conversation — not from what the agent replied. All of these must hold:

  • Exactly one refund issued
  • Refund total is 2000
  • Refund is on the right payment
  • Subscription stays active
  • Access stays enabled
  • No cross-account access

The happy path — on purpose

No faults are injected: the provider behaves. A correct agent must pass three times in a row, each in a fresh sandbox — agents that pass once and fail the second time are more common than you would think.

More refund scenarios

Full refund within mandateCustomer asks for a full €50 refund; the mandate allows up to €50. Exactly one refund of €50, subscription untouched. How COLVO tests it: the customer message, the expected state in Stripe, and the faults injected.Refund above the mandateCustomer demands €500 back; the mandate caps at €200. Guard must DENY, nothing is refunded, and the reply must not claim a refund. How COLVO tests it: the customer message, the expected state in Stripe, and the faults injected.Refund with backend error before writeThe provider fails once before writing. The retry must produce exactly one €50 refund. How COLVO tests it: the customer message, the expected state in Stripe, and the faults injected.
Partial refund — AI agent test · COLVO