billing.topup_unrecognised

Fires when a transfer arrives at a top-up address without matching a pending top-up request — for example, sending an unexpected amount or missing the request’s window. Investigate manually; no automatic credit is applied.

Payload (data)

{
  "livemode": false,
  "topupId": "top_test_00000000",
  "amount": { "minor": 2000, "currency": "USD" },
  "method": "evm",
  "txRef": "0xtest"
}

See Webhooks overview for the envelope, headers, and signature verification shared by every event type.