Thanks Dave....
It is a little more complicated:
It is an iPad mini used by my niece in Chile.
What happened to her is that she restaured to factory settings (for reasons I do not know at the moment) ,and when now trying to use the iPad,it says:
"This iPad is associated with an ID of Apple XXXXXX.Iniciate session with the Apple email you used to configurate this iPad"
Using that email,she gets the message:
"You can not unblock this iPad using this email"
She is certain that that is the correct email address,and when trying to reset the password,she was sent a message by Apple to reset it.
This means to me that Apple is recognizing her email?
She is the former (before the factory restore) and still now,the owner of this iPad mini,and there has to be a way for her to activate this iPad again
Alberto