My daughter is currently staying with family in US (she is US citizen, but normally lives in Brazil). I wish to travel to see her, but AA have not been able to confirm what I would have to take to prove I am the father of a US citizen. I am assuming copies of birth certificate and passport will suffice, but I don't like 'assuming' in this case given all the other hoops I need to jump though.
Also, am i allowed to quarantine with her and her uncles family or do I have to isolate?
I haven't been following this very closely, but several months ago it was apparent that travelers trying to use ESTA to fly from Europe to the US were having their ESTAs cancelled automatically even if they were excepted from the public health restrictions.
You will therefore need to find out how to prove your relationship before you board, whether by getting your exempt status formally registered in the ESTA system or by getting a B-2 visa. Once you've taken one of these steps with the US government, you can bring whatever documents you needed for that along with you to show to American Airlines.
If you already have a valid visa that was issued before the travel restrictions were imposed, you might want to ask the consulate what documents they would require to issue a visa now.
