# head ###### Pass this parameter in all gateway requests regarding checkout, delivery and post-checkout ↔ Request/Response parameter ## `` ### XML Examples ```xml Request ratepay.api.pay.payment-request.request.head.xml myshop

A12B3CD23J3KU324DADK

PAYMENT_CHANGE

account123

6cddf6b3a0e03412b0f3c0615616025a

O-1234-HDZ

CUSTOMER4711

12345 678910

1.8

``` ```xml Response ratepay.api.pay.payment-request.response.head.xml myshop

A12B3CD23J3KU324DADK

PAYMENT_REQUEST

PAYMENT_PERMISSION

O-1234-HDZ

CUSTOMER4711

neutral

2012-04-30T12:27:39.234 Successfully Request successful Transaction result pending ```