Yes I did since we each need two Voucher for another fight upgrade FRA-BOG where we were on the waiting list! I asked the agent if she doesn't need the FFL number of my partner and she replyed she had that on file. I thought okay right the FFL is in the booking. I was a bit surprised that she did not ask for three numbers out of the PIN number. NOW I know why! She just deduckter two vouchers out of my account without asking me.