I crossed the San Ysidro border portal and I notice that the patrol forgot yo give me one of my daughters passaport back what can I do I couldn't turn back to get it

If you contact them directly, and let them know what gate you went thru, they will have it for you.

Hopefully they have a lost and found there. I am sure they do have something like that there. I am sure this isn't the first time this has happened

Thank you I've left a couple voice-mail because they don't answer