WHAT IS AGREEMENT REGISTRATION NUMBER FOR MY IPAD

What 'agreement registration number' ?

For info you are talking to fellow users here on these forums, not iTunes Support nor Apple - I've asked the hosts to remove the serial number from your post.

(And for future info typing all in capitals is considered shouting, makes posts difficult to read, and may mean that people are less likely to reply.)

Where did this question arise?

Could be a scam of some sort if you get an email requesting the info.

Robert