> For the complete documentation index, see [llms.txt](https://developer.magtek.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.magtek.com/api-and-command-reference/scra-dynafamily-programmers-manual/data-types-and-shared-tlv-data-objects/certificate-signing-request-csr-file-types.md).

# Certificate Signing Request (CSR) File Types

These file types conform to the **Common File Structure** format.

The File Payload of these files contain a certificate signing request in PEM format. To generate a CSR see **Generate CSR (WLAN Only) - Command 0xEF03**.

The device will erase the CSR file from volatile memory after the host fetches it with **Command 0xD821.**

**- Start Get File from Device**. After fetching the CSR, the keys used to generate the CSR will still exist in non-volatile memory associated with a CSR and can be used to generate a new CSR if needed.


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