1. Both paries are legal age
2. Both just signed a document and have it registered wherein thay can get a copy of the certificate of marriage from NSO
3. No ceremony was done, no witnesses and no solemnizing officer is around when they signed the papers.
4. The couple was able to use that marriage certificate to file and get greencard for the wife. In the US all their papers are legal and their status is married.
Pease advise po. Thank you so much