When using ACH/eCheck with Stripe, a bank account verification page URL is generated for each bank account added to a customer.
By default, this url will be included in an email sent to the customer when a bank account is created.
Below is an example of a bank account verification page that a customer will use to verify their bank account.
Generally, if the customer needs the URL again, you can re-send the email from the payment details page:
Alternately, you can generate the url by following the instructions in the Self-Service Page URLs documentation.