Well, I've been terminated from petsmart today, apparently somebody has been returning items and using my associate number so I now have to pay back $145 of stole items, that I never took

my manager says I'm a liar and said that I'm fired from our store for stealing...
Lucky me... just when I was really starting to enjoy my job at Petsmart this happens, god why do people need to steal anyways... well, off to look at job ads, wish me the best of luck.
well being from the UK, i cant hep much on the law side., however there are some things you could do that may help. you will need good support, from family and/or partner though:
was your staff number known only to you and the manager? if not, list all those who had access to it.
how was the ID/number entered? if by hand, see above. if by magnetic card. it more difficult, but if you sent me it, i bet i could make you as many copies as you need in 1/2 an hour. this means even that is not a forgone conclusion, it was you that used it.
as for paying off the sum lost, tell them to go to the police. unless they can PROVE it was you who did it, they will not have a leg to stand on. many company's try to do this. relying on the fact that many will not challenge them. it does not matter what they tell you, THEY need to prove it was you, not the other way around.
unless you challenge this, the fact that you were sacked for theft, will follow you for many years.
It is my experience that this sort of thing is, often done by the immediate superior of the accused. though someone you have fallen out with, would be up in the favourites too.
remember, it is just as illegal to incorrectly accuse a person of theft, as it is to steal. your boss may not agree, but he would be morally and legally wrong. FIGHT IT AND HARD!