When the user clicks Send to Zuora to sync the quote and new payment method, Zuora processes the initial payment on the subscription using the new payment method. At that point, Zuora will treat the new payment method in one of three ways which you as an administrator) can define:

• Set it as the default payment method, and enable auto-pay for the account.
• Set it as the default payment method, but do not change the account's auto-pay.
• Do not set it as the default payment method, and do not change the auto-pay setting. This setting gives you the option of using the new payment method for a single payment only. For existing accounts, future payments revert to the account's existing default payment method. For new accounts, no default payment method is set.