This was in the offer terms for my new BCE, don't know if it applies to your card, but I'd check:
Balance Transfers: Only balance transfers from accounts in your name requested within 30 days from the date of account opening will be approved. We will charge your Card account for the total approved amount of all balance transfers. No transfer will be processed if: (1) any requested transfer is less than $100; (2) the total amount of all requested transfers exceeds the lesser of $7,500 or 75% of your credit limit; or (3) charging the requested transfers to your Card account would cause your total account balance to exceed your credit limit. We will not initiate any balance transfer until at least ten days after we have mailed or otherwise provided the Card Member Agreement to you. In some cases, it may take up to six weeks to complete a balance transfer. Please be sure to make all required payments on any account from which you are transferring a balance until the balance transfer is credited to that account. You authorize us to verify the balance of such accounts. You may not transfer balances from any account issued by American Express or any of its affiliates. Additional Card Members may not request or authorize balance transfers. Your balance transfer request may be declined if any of your American Express accounts are not in good standing.
