NYBanker - qudos for your post - incredible how someone who joined this community only a few months ago, with the grand total of 14 posts, feels compelled to have to be obnoxious, instead of just giving a simple one word answer.

DaveInLA - you are correct, the other person you want to send funds to has to register their email address and other details on Amazon Payments.

You can have more than 1 AP account in your name - just slightly modify your first name.
So, for example, David Smith, Dave M. Smith and Davey Smith should all be OK. I use this method, and have had no issues for coming on 3 years.

Then your spouse can have 3 accounts, for example Susan Smith, Sue L. Smoth and Susie Smith.