Almost a decade ago, my son's father and I split up. We had bought a house and were together 3 or so years. We agreed on a sum to pay him out of the property and I remortgaged. Our conveyancer drew up a transfer agreement which we both signed and I paid him out the agreed sum. I continued to service the mortgage as a sole parent and finally paid it off and recently sold it and re-purchased. My question is, as we didn't get family court orders or a Binding Financial Agreement. Can he now come back and make a further claim? If so, how can I protect myself? He has nothing to do with our son (his choice), hasn't paid and child support for years and lives overseas.