I'm using the N/ui/dialog Module for our sales reps to acknowledge some custom business rules a lot more complex than what we could do in Suiteflow. Anyways, there is some gaming of the system going on, so I would like to start logging when people acknowledged things. It seems I cannot write to System Notes via SuiteScript. Would the next best option just creating a custom record that stores the information I need? Thanks in advance.

the usual option for storage is a custom record

10-4. Thanks!

sometimes people think of using native records like user notes, though you probably wouldnt in this case

use custom fields that your script updates. any changes to them are logged by NS in system notes.

Agree with battk, I log certain field changes to a flexible custom log table user don't have access to modify but the script runs as admin. this is helpful especially when the field is a custom status field. Then you can see who changed and use analytics to determine time to move between statuses. I give them access to view as a subsist so they can see themselves gaming... it autocorrects the behavior 😀