AMPs used to be a FL exclusive a long long time ago but not anymore, so I highly doubt if they still attach a tag when you buy a pair from FL nowadays.
I checked an extensive online TN archive, it's not there. Checked FL SM accounts, nothing there. FL EU website, nothing there.
That IG account so wrong in so many ways --> still going with fakes.
-edit
just now spotted some obvious fake AM1s in 1 of their recent IG posts. Nuff said.