This is a long time customer. Moved into a new house this year. ($528,000). Let me loose in August. He still owes me $150 from May. He says that he paid me, said it was ck. #----, and was cashed on 7-9-01. I keep very good records. He has been ignoring every bill that I send him, asking that he send me a copy (front and back) of check for my records. I DO NOT believe him, (nor should I). Should I warn him of small claims or just go ahead with the suit??