The problem seems to be that you cannot find the seller of the property you bought to make payments to him though personal delivery, U.S. mail, or wire transfer. I am surprised that you have not been contacted by him for payments that have not been made.Before making any payments to him, you should make sure that you are on legal title to the property that you bought form this real estate agent. Once confirmed you are on legal title to this property, the best way to find him to make contact and pay the monthly payments is to go online through the internet through the state of Texas' Department of Real Estate to locate this real estate agent or contact Texas' Department of Real Estate (I assume he is a licensed Texas real estate agent). You should then get a locate on him with his affiliated brokerage to make contact with him.Another option is to do an online search for this real estate agent for address location on the internet. If you cannot get a locate on this suggestion, there are services on the internet that you pay a fee for them to do a locate for an individual. Cost is around $25.00 to $30.00 typically.Good luck.