How do you know the extension was filed using Lacerte?

I assume you know an extension was filed because you tried to do so, and it was rejected?

My thoughts:

1) simple error/dancing fingers by someone else in the universe filing extensions this weekend.

2) identity theft (client) 

3) you've been hacked.

(altho for #2 & #3.... you'd think more than just filing an extension is what would happen)