TexasCHLforum.com

There's no gun registration in Texas, so there's no way for him to register it in his name removing it from yours.

Some people suggest, and I think it may be a pretty good suggestion, to make a bill of sale and you each get a copy of it. This protects you both.
Just a note saying "I [your name] am selling [make, model, serial number] to [his name]." You both sign it. Drivers license numbers or other identification would be a good idea.
If it's later used in a crime, and it's traced to you, you can show where you got rid of it. Going the other direction, if you purchase a firearm from an individual and have such paperwork, if something happens and Mr. Policeman runs the serial number and it comes up as stolen, you can show who you bought it from.

Other people feel that the beauty of the friend-to-friend sale is that no one can document what weapons you have.
So . . . your mileage may vary.