Is there a way to prevent saving of a record of there's no attachment using a workflow? I tried Return User Error action with a saved search condition where the criterion is Files...Internal ID is not empty triggered at Before Record Submit but it doesn't work.

were you able to catch the null value on your script?

I have very very limited knowledge on scripting, that's why I'm just doing it via a workflow. Now that I think of it the record must be saved first before it can't be picked up by my saved search condition until then. But it's the exact opposite of what I want which is to prevent it from being saved if there's no file attached.

We created a custom attachment field and then set it as mandatory via workflow.

@Laura asin a custom Document field? Can it only be made mandatory using WF? Can you not set it mandatory either at the custom field level, or the form level ?

Yes it can be set to mandatory on the field or form level. We set it on the workflow because we only wanted it mandatory for the one region.

We're hoping we can use the Files sublist to maximize the drag and drop functionality but it seems that it's not technically possible via workflow.