TexasCHLforum.com

Maybe email them first to make sure you have a trail of some kind. Only send the firearm and be sure to do it how they prefer.

Also, take eveything else out of the box, be as plain in the packaging as allowed and I would probably go as far as placing a copy of the email in the box, along with a sticker, piece of tape on the pistol, with name, address, etc....