If a company states that you are guilty of cheating what proof do they have to show?

A company that accuses an employee of stealing, cheating on books, etc., has got to have proof! If any machinery, tools, etc., have been stolen from the company (any files, etc.) unless they have that person on tape the company doesn't have a case! They can't make a false statement and if you are not guilty I suggest you see a lawyer and sue the company. If you don't this will show on your record for further employment and ruin your future. If you are guilty then bite the bullet! In general in the US you have to be charged with theft and convicted, or admit guilt, in order to be fired. For less serious charges, like cheating on the mileage on your expense report, if they can document it you'll be fired for lying. It is highly unlikely that any company execs. would accuse an employee of wrong doing if they did not have sufficient evidence to support the claim. They are however, not required to submit the evidence to the accused unless or until it becomes a matter of the court. The "proof" would obviously depend upon what type of position the accused held, such as working in accounting/bookeeping, sale of goods or services, and so forth. If the person is fired and they believe it to be unjustified it is their responsibility to obtain legal advice or representation or to handle the disputed firing "pro se". An employer can fire you for any reason - good, bad or unproven - that does not violate a statute or a contract. An employer need not ever "prove" or explain a decision or discipline to an employee (if you are unionized, the employer explains to the union). Proof is a word for the courtroom, where there are standards of proof. Employers who want to have employees' trust should gather "relevant and credible evidence" before disciplines.