Send a One-Time Password (OTP) to a Signer

Use this endpoint if you are integrating your own signing flow (Signers won't go through Yousign's pre-made signing flow).

Once the OTP is sent, the Signer must provide it back to complete the Signature Request. You can then provide it to the Sign a Signature Request endpoint to complete the signature on behalf of the Signer.

Related guide: Building your own signing flow

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To use this endpoint, you must match the following conditions:

• You are in free API Trial period or you are on a SCALE plan
• The Signature Request delivery_mode must be set to none
• The Signature Request must not have any Approver
• The Signature Request must not have the parameter signers_allowed_to_decline set to true
• The signature level must be "Simple eSignature".
• No Signer Fields can be used, except the Signature Field
• A otp.too_many_request error will be thrown in case of
  • Same requests are made in a time frame below 15 seconds.
  • More than 5 requests are made for the same OTP.