If I provided photos of us together in the petition, why is it sometimes asked for in the beneficiary’s interview?
You’ll be asked to provide photos of you together as proof that you have met in person. It is up to the interviewing officer’s discretion at the embassy to require you produce things that have already been provided in your original petition or they can also ask few of your additional documents. They may ask to see even more than was submitted, so if you have them, it’s better to bring them.
Some people will take a bunch of photos to the interview and they say nobody even looked at them. They may not ask for them. What we do is try to build for you the best case possible. That doesn’t mean everything we ask you to bring will be asked by the officer. It just means that somewhere in the past we’ve learned the hard way that they might ask for this piece of documentation. You may not need it, but it’s better to have it then not need it than need it not have it.