I have created a Adobe document with several form fields. Three of them include ways to pay. I want to ensure that they select a way to pay (check, invoice, at the door) before saving. Is there a way to run a validation before they save the file, to ensure one of the options is checked?
Yes and no - you can attach code to the doc.WillSave event but as the name suggests you cannot stop the file being saved, by the time that event fires the decision has been made.