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 the checkbox for the bank account you want to manually verify.
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".