As in which way?
When transferring TBT to another player, simply go to the players name in the thread and click on the amount of TBT they have and enter the amount of tbt you are giving. With IGB, there's two methods ; one method is Retail which the player receiving the IGB has to put items up in the shop at the max bells it can have which makes the other player claim it and sends the bells you listed to your bank. Another method is dropping bells, where the player drops the amount of bells you ordered onto the floor for you to pick up and deposit yourself.