TRANSACTION_REVERSED

{
  "event":       "TRANSACTION_REVERSED",
  "eventId":     "evt_01HXY123456ABCDEF",
  "businessId":  "BUS1A2B3C4D5E6F",
  "environment": "LIVE",
  "timestamp":   "2026-05-22T14:00:00Z",
  "data": {
    "transactionId":        "txn_01HXYZ6666ABCDEF9999",
    "cardId":               "crd_01HXYZ5555ABCDEF1111",
    "cardholderId":         "chl_01HXYZ1234ABCDEF5678",
    "externalId":           "my-user-id-789",
    "type":                 "REVERSAL",
    "status":               "REVERSED",
    "amount":               29.99,
    "currency":             "USD",
    "billingAmount":        29.99,
    "billingCurrency":      "USD",
    "merchant": {
      "name":           "Amazon",
      "id":             "AMZN_MERCHANT_001",
      "city":           "Seattle",
      "country":        "US",
      "mcc":            "5999",
      "mccDescription": "Miscellaneous General Merchandise"
    }
  }
}

{}

WEBHOOK

{
  "event":       "TRANSACTION_REVERSED",
  "eventId":     "evt_01HXY123456ABCDEF",
  "businessId":  "BUS1A2B3C4D5E6F",
  "environment": "LIVE",
  "timestamp":   "2026-05-22T14:00:00Z",
  "data": {
    "transactionId":        "txn_01HXYZ6666ABCDEF9999",
    "cardId":               "crd_01HXYZ5555ABCDEF1111",
    "cardholderId":         "chl_01HXYZ1234ABCDEF5678",
    "externalId":           "my-user-id-789",
    "type":                 "REVERSAL",
    "status":               "REVERSED",
    "amount":               29.99,
    "currency":             "USD",
    "billingAmount":        29.99,
    "billingCurrency":      "USD",
    "merchant": {
      "name":           "Amazon",
      "id":             "AMZN_MERCHANT_001",
      "city":           "Seattle",
      "country":        "US",
      "mcc":            "5999",
      "mccDescription": "Miscellaneous General Merchandise"
    }
  }
}

{}

Deprecated — superseded by TRANSACTION_PROCESSED (status: REVERSED). Still delivered to existing subscribers, so no migration is required. New integrations should subscribe to TRANSACTION_PROCESSED.

Fires when a card transaction is reversed. This covers two scenarios:

Pre-settlement reversal: An authorization is voided before it clears — the reserved funds are released back to the card.
Post-settlement refund: A merchant issues a refund after the transaction has cleared — funds are credited back to the card.

Event Type

TRANSACTION_REVERSED

Payload

{
  "event":       "TRANSACTION_REVERSED",
  "eventId":     "evt_01HXY123456ABCDEF",
  "businessId":  "BUS1A2B3C4D5E6F",
  "environment": "LIVE",
  "timestamp":   "2026-05-22T14:00:00Z",
  "data": {
    "transactionId":        "txn_01HXYZ6666ABCDEF9999",
    "cardId":               "crd_01HXYZ5555ABCDEF1111",
    "cardholderId":         "chl_01HXYZ1234ABCDEF5678",
    "externalId":           "my-user-id-789",
    "type":                 "REVERSAL",
    "status":               "REVERSED",
    "amount":               29.99,
    "currency":             "USD",
    "billingAmount":        29.99,
    "billingCurrency":      "USD",
    "merchant": {
      "name":           "Amazon",
      "id":             "AMZN_MERCHANT_001",
      "city":           "Seattle",
      "country":        "US",
      "mcc":            "5999",
      "mccDescription": "Miscellaneous General Merchandise"
    }
  }
}

Payload Fields

Field	Type	Description
`transactionId`	string	Unique transaction ID for this reversal event
`type`	string	Always `REVERSAL` for this event
`status`	string	Always `REVERSED` for this event
`amount`	number	Amount reversed and returned to the card, in dollars

All other fields are the same as TRANSACTION_AUTHORIZED. See Transaction Events for the full field reference.

{
  "event":       "TRANSACTION_REVERSED",
  "eventId":     "evt_01HXY123456ABCDEF",
  "businessId":  "BUS1A2B3C4D5E6F",
  "environment": "LIVE",
  "timestamp":   "2026-05-22T14:00:00Z",
  "data": {
    "transactionId":        "txn_01HXYZ6666ABCDEF9999",
    "cardId":               "crd_01HXYZ5555ABCDEF1111",
    "cardholderId":         "chl_01HXYZ1234ABCDEF5678",
    "externalId":           "my-user-id-789",
    "type":                 "REVERSAL",
    "status":               "REVERSED",
    "amount":               29.99,
    "currency":             "USD",
    "billingAmount":        29.99,
    "billingCurrency":      "USD",
    "merchant": {
      "name":           "Amazon",
      "id":             "AMZN_MERCHANT_001",
      "city":           "Seattle",
      "country":        "US",
      "mcc":            "5999",
      "mccDescription": "Miscellaneous General Merchandise"
    }
  }
}

{}

Authorizations

Authorization

string

header

required

API key from the FYATU CaaS portal. Pass as Authorization: Bearer <key>.

Body

application/json

event

string

Example:

"TRANSACTION_REVERSED"

eventId

string

businessId

string

environment

enum<string>

Available options:

LIVE,

SANDBOX

timestamp

string<date-time>

data

object

Show child attributes

Response

200

Acknowledge the event.

Guides

JIT Authorization

Card Events

Transaction Events

Cardholder Events

Account Events

Billing Events

Event Type

Payload

Payload Fields

Authorizations

Body

Response

​Event Type

​Payload

​Payload Fields

Authorizations

Body

Response

Event Type

Payload

Payload Fields