Log in to your Checkbook.io account.
Go to "Settings" on the bottom left-hand side of the page.
When in Settings, click on the "Accounts" tab.
When in "Accounts", click "Verify".
Verify your account by making micro-deposits that will be applied to your account by the next business day.
Check the transaction history for the account you are attempting to verify. Locate the micro-deposits that were made and enter them in the appropriate text field in the dialog box. When they are entered correctly, press "Submit".