Certainly your credibility would be better and more easily served if you have no criminal history, but the point is moot. These are easily upheld in most US jurisdictions and if subject to the rules of International binding Arbitration could be enforceable in about 70 other countries as well. Contracts that are poorly written or that do not specify details or have an element of criminal intent have a lower chance of success, but even oral contracts are binding in most jurisdictions. If it's written and accepted, the chances are excellent for judgement. Have a nice day.
Some people really post nonsense here.
Certainly your credibility would be better and more easily served if you have no criminal history, but the point is moot. Contracts that are poorly written or that do not specify details or have an element of criminal intent have a lower chance of success, but even oral contracts are binding in most jurisdictions. Have a nice day.