Is it possible to be charged with an offense and not know you've been charged?

Hello b:

Sure. You'll find out about it when they arrest you, or maybe they'll send you a letter. I don't know. Whadya do? If you robbed a bank, I doubt they'll send mail. But, if you ran a red light, they surly would.

excon

Yes, They will often charge you with the crime before you know about it, After that they will issue a warrant for you, and/or sometimes give you notice to appear.