Set authentication means

We currently support OTP via SMS as the authentication means for signature. You can define the participant’s phone number when configuring your transaction.

To make sure your participant reveives the OTP via SMS, first, verify that the phone number is from a country included in this list.

You need to pass two arguments to specify a participant’s mobile number in a transaction:

• phone_number: allows you to define the participant’s mobile number. Expected format is E.164 ([+][country code][phone number including area code]).

• phone_numer_type: allows you to define the type of the participant’s mobile number, among:

  • suggestion: you give Universign or the signer the authorization to use a different phone number that might be more appropriate.

  • flex_prerequisite: you give Universign or the signer the authorization to use a different phone number only for advanced signatures (we will always use the phone number defined on your side if the signature is level1.).

  • prerequisite: you don’t give Universign or the signer the authorization to use a different phone number.

In other words, Universign will always use the number you defined if you passed flex_prerequisite as a phone_number_type and:

• you requested a level1 signature.
• you requested an advanced signature and the participant already has a certificate linked to the number you defined.
• you requested an advanced signature and the participant does not have a certificate yet but agrees to use the number you suggested.

Universign will always use the number you defined also if you passed prerequisite as phone_number_type, no matter what the signature level is.

However, we may use a different phone number to authenticate the signer if:

• you passed flex_prerequisite as a phone_number_type and:
  • you requested an advanced signature and the participant already has a certificate linked to a different phone number than the one you passed.
  • you requested an advanced signature and the participant does not have a certificate yet but prefers to use a different number than the one you suggested.
• you passed suggestion as a phone_number_type.

Set mobile phone number as a suggestion

Send a request to POST /v1/transactions/{transaction_id}/participants and pass the participant email, the phone number in the phone_number argument as well as suggestion in the phone_number_type argument:

curl
https://api.universign.com/v1/transactions/tx_AWo949MOq0JE/participants \
-d [email protected] \
-d phone_number=+33623456789 \
-d phone_number_type=suggestion

Set mobile phone number as a flex prerequisite

Send a request to POST /v1/transactions/{transaction_id}/participants and pass the participant email, the phone number in the phone_number argument as well as flex_prerequisite in the phone_number_type argument:

curl
https://api.universign.com/v1/transactions/{transaction_id}/participants \
-d [email protected] \
-d phone_number=+33623456789 \
-d phone_number_type=flex_prerequisite

Set mobile phone number as a prerequisite

Send a request to POST /v1/transactions/{transaction_id}/participants and pass the participant email, the phone number in the phone_number argument as well as prerequisite in the phone_number_type argument:

curl
https://api.universign.com/v1/transactions/tx_AWo949MOq0JE/participants \
-d [email protected] \
-d phone_number=+33623456789 \
-d phone_number_type=prerequisite

Note that if you don’t pass a phone_number_type, default value is suggestion.

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Set participant name

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