I have a client out of state and he wants a roof installed for a house he is buying to flip. He has asked if we will except a credit card for payment. Im looking at the Texas Construction Associations lien waiver forms and it clearly states payment by check. I only assume this document cannot be altered if the statue was written for payments in the form of a check. Are we able to contract a conditional lien waiver to customer if they are using a credit card for payment?