Log in to your PayPal account by entering your username and password on the homepage of the PayPal website and clicking "Login."
An eCheck is a method of payment accepted by PayPal, an online payment service. Similar to an automatic debit from your bank account, an eCheck is paid by linking your bank account to your PayPal account. An eCheck is similar to a regular paper check in that it takes several days to clear your bank account. As long as your eCheck has not cleared your bank account, you can cancel it at any time.
Click on the "History" link on your account overview page. Find the "Order Status/Actions" section and click "Cancel."
Click on the "Cancel Payment" link next to the eCheck payment you want to cancel. Confirm your decision to cancel your payment by clicking "Yes, Cancel my Payment." A confirmation page is sent to your email address; keep it for your records.