FlyerTalk Evangelist
Join Date: Nov 2018
Location: Istanbul, Turkey
Programs: TK Elite Plus,BAEC GGL,ITA Executive, AFKL Gold,QR Gold,HH Diamond,Bonvoy Gold,ALL Gold
Posts: 14,186
I have flown to the USA with Lufthansa multiple times during the pandemic and I was always handed an empty form of the Attestation Form at check-in so that I could fill it out.
YMMV but sometimes they collect it at FRA and sometimes they do not.