Thanks, that's really helpful. Say, do i need to show something to you?
Indeed, you do. You need to show us a proof of your identity. As for the child, that document must be a valid one and have name, age and a recent photograph.
Then all this is what i have to go through to get that replacement, right?
That's correct. This is the process for you, in case your child's SSN card is lost or stolen.