Payin id to be refunded.

Todas as requests para a API da Transfeera deve conter o Header "User-Agent". Use este Header para nos dizer qual o nome da sua empresa e um e-mail para contato

An idempotency key is a unique value generated by the client which the server uses to recognize subsequent retries of the same request. How you create unique keys is up to the client, but we suggest using V4 UUIDs, or another random string with enough entropy to avoid collisions. Idempotency keys can be up to 255 characters long.