I have a situation where I was as to fix a roof on a barn for a lady and the first weeks hours were tallied and the amounts was paid but this week's hours she refuses to pay stating that we were not working for an hourly amount instead we were working as if it was a hard money bid which was never discussed nor agreed upon nor was it so the week prior when we were paid for hours worked. Now she is under refusal to pay and although and unlicensed contractor I feel I should be able to apply for a mechanic's lien until are amount is satisfied and furthermore now we have to go back and put the barn in a safe condition causing more lost in time and man-hours. So my question is can an unlicensed contractor such as myself mechanic's lien against a non-paying customer?