Batch debit

Refund a debit

POST/api/v1/cms_refund_ad_by_fw

Authorization + signatureFirm bankingSchema in review

Requests a refund of a debit through Fintwin.

The detailed schema is still being confirmed. After sign-in, Try still sends the form body to the sandbox.

This API needs a Signature header. The portal signs when that company code has a signing key configured. Without it, the sandbox receives the request unsigned.

Headers

Fields	Description
`Content-Type`Required	application/json
`Authorization`Required	Authorization key Fintwin issues for the company code.
`Signature`Required	Body integrity signature. The signing key is issued with the API key.

Body

Fields	Description
`TRT_INST_CD`Required	Organization code.
`TRSC_DT`Required	Original transaction date.
`TRSC_SEQ_NO`Required	Original sequence.

Samples

curl -X POST 'https://sandbox.example.invalid/api/v1/cms_refund_ad_by_fw' \
  -H 'Content-Type: application/json' \
  -H 'Authorization: <authorization-key>' \
  -d '{"TRT_INST_CD":"TEST0001","TRSC_DT":"20261014","TRSC_SEQ_NO":"0000001"}'