Banks also can not charge you a fee for going over your credit limit, unless you specifically opted into a program that allows for this. (valuepenguin.com)
Just be careful that you don't go over your credit limit for any card while you're performing the transfers. (thedigeratilife.com)
You should try to keep the balance below the limit so that you never go over the credit limit on your card. (canadiancashsolutions.com)