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WEBHOOK
card.transaction.reversed
{
  "event": "card.transaction.reversed",
  "version": "3.20",
  "eventId": "b3c4d5e6-f7a8-9012-cdef-123456789012",
  "sign": "a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6q7r8s9t0",
  "data": {
    "cardId": "crd_9x8y7z6w5v4u",
    "cardholderId": "CH-ABC123DEF456",
    "reference": "REF-003",
    "originalReference": "REF-001",
    "amount": 29.99,
    "currency": "USD",
    "status": "REVERSED",
    "timestamp": "2026-04-30T11:00:00+00:00"
  }
}

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{
  "event": "card.transaction.reversed",
  "version": "3.20",
  "eventId": "b3c4d5e6-f7a8-9012-cdef-123456789012",
  "sign": "a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6q7r8s9t0",
  "data": {
    "cardId": "crd_9x8y7z6w5v4u",
    "cardholderId": "CH-ABC123DEF456",
    "amount": 29.99,
    "currency": "USD",
    "status": "REVERSED",
    "timestamp": "2026-04-30T11:00:00+00:00"
  }
}

Body

application/json
​
event
string
Example:

"card.transaction.reversed"

​
version
string
Example:

"3.20"

​
eventId
string<uuid>

Unique event ID — use for deduplication

Example:

"b3c4d5e6-f7a8-9012-cdef-123456789012"

​
sign
string

HMAC-SHA256 of the data object using your webhookSecret

Example:

"a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6q7r8s9t0"

​
data
object

Response

200

Acknowledge receipt of the event