Go up to the teller and say "I need you to check this out for me" show her your back account details and hand it to her with your wrist showing towards her, while you hand her your statement look at her then your wrist to give the signal, if she is smart she will catch on
DO NOT CHANGE THE WORDS! Just say it like its spelled out for you, DONT say I need you to check this statement for me or I need you to check this bank account for me... Its Subliminaly done! Ive tested it out while I was on a holiday walking around with a map, after they see my wrist they usually pretend not to notice while pulling their hair back.
Let me know how it goes