i wasnt planning on returning it ? but will the mileage stay in the acct ?
yes & no
will the 1200 miles be deducted from yur AA acct, not likely.
Will yur Citi AA acct have a neg debit of 1200 most likely, what this means is if on yur next statement you were suppose to have gotten 200 miles for $200 of charges you will get 0 miles and it will stay that way till you have $1200 of new charges to make up for the deficit of the 1200 miles from the refunded $1200
now what if you have no other charges and just a -1200 on your acct and then CX the acct, most likely they wont go and take it back from AA. But I wouldnt CX my CC over 1200 miles maybe 120000 but then again Im sure for that amount they will take tem back from AA