Sure, don't worry. If happens that you don't have one or any of those documents at hand and you are not able to get a replacement shortly, then we can allow you to present other documents to us. Of course, such documents must be valid and showing date of birth or age, as well as a recent photograph.
Oh, of course i'll keep that in mind. Look, what happens if i'm not a U.S citizen?
You don't need to worry. If you're under that condition, the Social Security will ask you to see a current DHS document, such as Form I-551 Permanent Resident Card, for example.
Oh that's good there is many options. Look, going back on child's documents, once more, what can i do if i don't have a document, at hand?.