> For the complete documentation index, see [llms.txt](https://docs.faspay.co.id/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.faspay.co.id/merchant-integration/api-reference-1/credit-card-transaction/additional-api-integration/untitled.md).

# Signature Transaction

Signature transaction is a security feature that allows the merchant to identify the transaction script from faspay system. Signature transaction is generated based on the parameters that are described in more detail based merchant transaction password. Password transaction will be shared by faspay, and the password is one of the important information in the hash (encryption of data). If the password is being used, then the signature that generated wrong and can not be integrated with faspay.


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