Optionalcustom_Optionaldefault_ID of a payment method that's attached to the customer, to be used as the customer's default payment method for subscriptions and invoices.
OptionalfooterDefault footer to be displayed on invoices for this customer.
Optionalrendering_Default options for invoice PDF rendering for this customer.
The list of up to 4 default custom fields to be displayed on invoices for this customer. When updating, pass an empty string to remove previously-defined fields.