To add your public address to your Bity account, follow these steps:
Go to “Exchange”, choose both currencies and amounts you need and click on “Continue”.
Enter the public address corresponding with the cryptocurrency chosen and/or the IBAN and click on the "star" icon in order to register it ( you can easily add a name here in order to label it ).
That's it, you'll be able to use this crypto address/IBAN the next time you place a new order.