in tDAR, billing accounts are used to manage multiple purchases, or invoices. If you're done with your account, you can transfer the balance of a billing account to another account or user. The process is quick and easy:
Step 1: Go to your billing account from your dashboard
a) click on the billing accounts link at the top of the dashboard.
b) Choose the account you'd like to transfer
Step 3: Choose the account you'd like to transfer:
Step 4: Click Submit & you're done.