My boyfriend's mom gave me a small coffee can full of pennies, I've gotten used to finding small minor errors, but not this one I know its an error for sure but couldn't find another like it online, but also not sure what its called. You can clearly see the "United of" between Liberty and In and lighter other letters behind "God We trust". What also looks like the obverse on reverse but much lighter. I took several pictures , regular, mono, and even negative so that all you amazing experts can enrich me.
Your Cent was crushed with another Cent creating incused and backwards lettering. Known as a Squeeze Job or Vice Job Not a mint error.. just damage Here is some information - http://www.error-ref.com/squeeze-job-or-vice-job-or-garage-job/
A ner'do well was attempting to create a counterfeit error. This isn't an error. It's damage as stated by Paddy.