Training method:  Repeat

Since your deaf dog will no doubt be going to the bathroom regularly as soon as you get her, you can start using the sign for “potty” as soon as you want to.  It is the ASL letter “t” for toilet, and all you do is make the sign and then shake your hand back and forth.  Do the sign as your dog is going to the bathroom, and when they make eye contact with you make sure you look happy so they know they are doing the right thing.  You can also add the “good dog” sign to reinforce that they are going in the right place.  After enough repetitions, you will eventually be able to give the sign and have them go potty on command.  The “potty” sign is also commonly used by people who teach their babies sign language before they can talk!