> You are reading the Docusign Developer Documentation. For clean Markdown of any page, append .md to the page URL.
>
> Documentation indexes by section:
> - APIs and SDKs: https://docusign.docs.buildwithfern.com/docs/llms.txt
> - Platform 101: https://docusign.docs.buildwithfern.com/platform/llms.txt
> - Extension Apps: https://docusign.docs.buildwithfern.com/extension-apps/llms.txt
> - Docusign CLI: https://docusign.docs.buildwithfern.com/docusign-cli/llms.txt
>
> Authentication (OAuth, JWT Grant, M2M): https://docusign.docs.buildwithfern.com/platform/auth
> Webhooks and Connect: https://docusign.docs.buildwithfern.com/platform/webhooks
>
> OpenAPI specifications: https://docusign.docs.buildwithfern.com/openapi.json
> MCP server: https://docusign.docs.buildwithfern.com/_mcp/server

# Rules for RequestSenderToken

* User_Does_Not_Exist_In_System – API user requesting the sending token URL does not have access to the system.
* Account_Does_Not_Exist_In_System – Account is not valid.
* Account_Lacks_Permissions – API user requesting the sending token URL does not have valid API permissions.
* User_Lacks_Membership – user is not a valid member of the account.
* User_Not_Envelope_Sender – user is not a valid sender in the account.
* Envelope_Does_Not_Exist – if envelope ID is provided, envelope ID does not exist.
* Account_Not_Authorized_For_Envelope – if envelope ID is provided, account is not valid for the envelope.