I don't understand a "waiver of Lein" payments. I still have to check with the Better Business Bureau for complaints and call the Licensing Board to see if the contractor I've received an estimate from is a licensed & certified builder before hiring him. The estimate from the contractor does state his address and phone number. I have to check to see if it includes his tax identification number. I am having my master bathroom shower pan and shower & tub tiles replaced. I am going over my contractor's estimate. He did document the description of the work to be done, but it is significantly lacking in details. I have asked that he include copies of his liability & workman's compensation insurance certificates, Statement of Warranty ( is material & labor guaranteed, if so, for how long), start & approximate completion dates, payment procedure, brand names, style, model numbers, a list of costs spelled out clearly, and the grade/quality of materials using., and that he/they are to clean up behind their work daily. I am requesting a clause in the contract allowing me to withhold payment if work slows down or stops. I came across a statement that advised I include a "waiver of lien" for payments in the contract. I am confused. Is that to safeguard me from a subcontractor coming after ME after I've paid the contractor for the job, in the event the contractor doesn't pay the subcontractor? Also, how does one check out the financial stability of a contractor with these overly stringent confidentiality regulations in place? Can you help me regarding the "waiver of lien?" Is there anything more I should do to safeguard myself? I know there should be a "Right to Cancel" clause, but if everything is satisfactory and the contractor & I both agree to my detailed inclusions, he/they can start ASAP. What do you think? Thank you! Susan Pough