This is the virtual bank account number associated with ACH Credit Transfers and is expected to show on invoices.
When allowing customers to pay invoice with ACH Credit Transfer, Stripe automatically generates a virtual bank account number that can be paid with ACH credit or USD wires. 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 and then mark that invoice as paid.