I borrowed some gil from a friend in linkshell because my FC friend wasn't on atm. When he came on he sent me some gil and I paid her back via Moogle. She never received the mail, gil was gone, nothing in the transaction history. I tried to send in bug report through support desk but that didn't seem to register either.

It wasn't a whole lot of gil but I can do quite a bit with 450k. I collected the gil I got from my retainer and ended up teleporting to her to pay back the gil via trade. Im now sitting on 100k x(