eli5 Why do scammers always ask for the last 4 digits of your ssn instead of the the whole number, what can they do with the last 4 digits?

Question

eli5 Why do scammers always ask for the last 4 digits of your ssn instead of the the whole number, what can they do with the last 4 digits?

In: Economics

Answer 1

A lot of things only ask for your first four. If they can guess a service you already have, they can use that to authorize themselves.