You can delete a customer using its ID. When a customer is deleted, all associated payment methods are also deleted, and all associated recurring billing subscriptions are canceled.

C♯
var result = gateway.Customer.Delete("the_customer_id");

result.IsSuccess()
// true

If the customer can't be found, it will throw a NotFoundException.

Arguments
CustomerId required, string

A string value representing an existing customer in your Vault.