This is the virtual bank account number associated with ACH Credit Transfers and is expected to show on invoices.
When allowing customers to pay invoices with ACH Credit Transfer, Stripe generates a virtual bank account number automatically, which can be paid with ACH credit or USD transfers. This virtual bank account is issued by Wells Fargo.
Once the customer has paid the amount owed, Stripe will automatically match the payment sent to that Wells Fargo account number and the amount owed to the invoice before marking that invoice as paid.