Original Card for a Foreign Born U.S. Citizen Adopted Child 
Information You must present original documents or copies certified by the agency that issued them. We cannot accept photocopies or notarized copies. All documents must be current not expired. We cannot accept a receipt showing you applied for the document. Adoption In some cases , we can assign your adopted child a number before the adoption is complete , but you may want to wait. Then , you can apply for the number using your child's new name. If you want to claim your child for tax purposes while the adoption is still pending , contact the Internal Revenue Service for Form W-7A, Application for Taxpayer Identification Number for Pending U.S. Adoptions. For more information, see Social Security Numbers For Children (Publication No. 05-10023). 

What original documents do I need? 
Citizenship We can accept only certain documents as proof of U.S. citizenship. These include a U.S. passport, Certificate of Naturalization N-550/N-570 or Certificate of Citizenship N-560/N-561. Foreign - born adopted children residing permanently in the United States may automatically acquire U.S. citizenship when they meet certain requirements. We may accept the following as evidence of U.S. citizenship : Certificate of Citizenship N-560/N-561 ; Certificate of Naturalization N-550/N-570 ; Machine Readable Immigrant Visa MRIV showing a category code of IR3 or IH3 ; or U.S. passport. Age You must present your child's foreign birth certificate if you have it or can get it within 10 days. If not , we will consider other documents such as your child's passport or a document issued by the Department of Homeland Security DHS as evidence of your child's age. Anyone age 12 or older requesting an original Social Security number must appear in person for an interview. We will ask for evidence to show that your child does not have a Social Security number. Here are examples of documents you can use to prove a Social Security number was 

user: Hello, I want to know about Social Security cards for foreign-born U.S. citizens adopted children.

assistant: to get your child a social security card you'll need to provide only original documents or certified copies of the required documents.

assistant: Are you planning to claim your child for tax purposes while the adoption process is completed?

user: No, I don't think I need it.

assistant: Ok, do you want more information about just in case you change your mind?

user: No, not really, but thanks.

user: can you give me an idea of what documents should I show as proof that my child doesn't have a social security number?

assistant: Sure. If your child lived in another country then you can use his current or previous passport as proof, or you could use his school records or how employment records in that country. Any document that shows your child lived in another country for an extended period of time would work.

user: You said at the beginning that certified copies are accepted, what about notarized copies?

assistant: Notarized copies are not accepted, only originals or certified copies.

user: And, what other documents, besides the normally aked ones, I can use as my child's proof of identity?

assistant: You could use his state-issued non-driver's ID card or his adoption decree, among other documents.