How to Identify if a Record Submission Originates from a Specific SuiteScript Client Script?

Create a hidden custom field of type "Free-Form Text" on the relevant record. Ensure the "Store Value" checkbox for this custom field is set to False. This configuration ensures the field's value is not permanently saved to the database and automatically clears after the record is saved.

Within the SuiteScript Client (SSC) script that is submitting the record, populate this newly created custom field with a specific identifier (e.g., the script's name or a unique flag) just before the record submission.

A server-side User Event (SUE) script, configured to trigger on the same record, can then read the value of this custom field during its execution. By checking the field's content, the SUE script can determine if the record submission originated from the specific SSC script.

Because the custom field's "Store Value" is set to False, its content will automatically be emptied after the record is successfully saved, making it a temporary flag for real-time detection without affecting stored data.