It would be great to have a warning pop-up to state then when going to save a new employee into the system that "you already have this SSN in the system as employee #_____, do you wish to continue to save?" If Yes, it saves, if No, it cancels out.

We just had a situation where we have an entered an employee 3 different times into the program (he was/is seasonal) (2 terminated and 1 now active). When running his earnings report we picked the wrong employee ID when we first looked him up by last name as it went to the 1st or 2nd inactive account.