So i have a broad option, isnt? Any document will do it, always it can show a proof of my residence outside?
Outside U.S, yes. But remember those documents must be original.
Okey dokey. Oh, i have a child who is 13, he can apply for his SSN card online too?
Sorry, but no. Any individual of age 12 or older must appear in person for an interview. In the same fashion, he'll need to prove tat he doesn't have any SS number.