I have been told now several times I didn't need t...

I have been told now several times I didn't need to fill out a certain form whereby I would continue to get my health credit for years of service, because I was " already in the system".. All of a sudden I'm told I HAVE to have it ! Now I may not be able to get it because it's having to be sent late! It took me forever to get the form! This happens too much! I need reliable information and quick response!