There are 2 ways to whitelist another account of yours.
Method 1
If you want to whitelist any other account of yours, all you need to do is send us the bank statement and account details to support@getbelong.com. The bank statement should not be older than 3 months, should have a transaction within 3 months. It should also have your name as on passport. The verification will take 1 working day.
Method 2 (only for UAE customers)
You can also whitelist your account via account linking within the Belong app in a safe and secure way. You will have to link and authenticate your UAE bank account and once that is done, your account will be whitelisted. This will be done instantly.