Enhancement Request: SMS-Capable Phone Number Validation

Current issue:
The phone number field does not prevent a landline number from being used when SMS authentication is selected. The envelope can therefore be sent even though the recipient may be unable to receive the SMS authentication message.

Requested enhancement:
Introduce phone number validation when SMS authentication is selected so that the system:

1. Identifies numbers that are not valid for SMS authentication.
2. Displays an “Invalid phone number” validation message.
3. Prevents the envelope from being sent until a valid mobile number is entered.

Business benefit:
Provides earlier identification of incorrect phone details, reduces unsuccessful authentication attempts by clients and envelope resends and minimises delays for recipients and operational teams.

Overall, this enhancement would improve the customer experience by preventing avoidable authentication issues and reducing the frustration and dissatisfaction these instances can cause.