Credit Card: Delete
ImportantTypically requires PCI SAQ D compliance We
  recommend using
  PaymentMethod
  functions to avoid any PCI concerns with raw credit card data being present on your server.
- C#
gateway.CreditCard.Delete(creditCardToken);Arguments
Tokenrequired, stringAn alphanumeric value that references a specific payment method stored in your Vault.
Additional Parameters
InitiatedBystringIndicates whether this deletion was initiated by the merchant or the customer (via the merchant site/app). Value should be one of CUSTOMER or MERCHANT.