American here with a Non O-A visa, spouse with a Non O visa. Now that we have arrived, we are looking at next steps for complying with visa extensions and the required documents and we realized that we were unaware that we needed to get our marriage certificate legalized.

The embassy processed the visa application based on a photo of the marriage certificate so I guess we thought it had passed muster.

Any additional insight on this issue would be welcome, and please also mention whether or not this (the legalized marriage certificate) is the only document needed for the trailing spouse to apply for the visa extension to match the validity of the Non O-A.