Sign Non Pro Certification

### Sign the non-professional certification for a user. **Available to:** All authenticated users **Environments:** Live **[Rate Limit](/overview/core-concepts/rate-limits):** 10 requests per hour, 30-second back-off, counts all requests Record a user's signature on the non-professional certification, which certifies the user as a non-professional for market data purposes. Each user signs the certification once — repeat calls for a user who has already signed are rejected. Both signing fields are required: - `signature` — must match the user's full name exactly - `date` — must be today's date (Central Time) By default, the certification is signed for the calling user. To sign on behalf of another user, set `userId` — this requires the caller to be an organization administrator with business-to-business account-opening (B2B AOP) permission in an organization that allows customer applications. A successful response returns a `successHashCode`. **Common Failure Scenarios** - The user has already signed the non-professional certification. - The signature does not match the user's full name, or the date is not today's date. - `userId` is provided but the caller does not have B2B AOP permission. **Error Messages** | `errorText` | Trigger | |-------------|---------| | `"Non-Pro Certification has been signed already"` | The subject user has already signed the certification. | | `"Invalid date"` | `date` cannot be parsed as a date. | | `"Signature date should be today’s date. Please update the date and click Sign."` | `date` is not today's date in Central Time. | | `"Signature should be the same as full name of the applicant"` | `signature` does not match the user's full name. | | `"Must be a B2B AOP user"` | `userId` references another user, but the caller is not an organization administrator with B2B AOP permission. |