Originally Posted by
semolina
Doesn't UA issue tickets as LAST/FIRSTM though? I imagine crediting FIRSTM to a FIRSTMIDDLE account would be more of a stretch than crediting FIRSTM or FIRSTMIDDLE to a FIRST account (though I could be wrong). After US/AA closes, UA will probably be the vast majority of my attempts at A3 mileage.
UA always for me puts LAST/FIRSTM . Maybe because my first name has 5 letters in it? Either way it's a big pain, but I have never had an issue with A3 giving miles to that.