The term "gateway descriptor" refers to a short text description that appears on a customer's credit card statement or bank statement when a transaction is processed through a payment gateway.

Some gateways allow the descriptor to be set from the application. These gateways are:
Adyen Affirm
Computop
Computop3DSV2
Concardis
Corefy
Everyware
First Cash
First Cash3DS
Green Money
Kalixa
MegaCharge
Moonlight Payments
NovalNet
PayArc
Paynetworx
Payon Gateway
Quick Pay
Skrill
Sure Pay

The descriptor is sent conditionally for:

BlueSnap (if the order is not native 3DS)
CheckoutV2 (bancontact, EPS, giropay, SEPA Debit only)
PagBrasil (credit cards only)
SquareV2 (credit cards only]
NMI (if the sendDescriptor box is checked on gateway setup)

NMI

After you select send descriptor, enable this setting on nmi's side.

Open

There are 3 ways to set descriptors:

1. Enter a descriptor on the Gateway setup. This is required. Obtain this from your merchant provider.

CRM > Gateways > Gateway List > edit

Open

2. Enter a descriptor on each campaign product. This is optional. A campaign product descriptor will override the gateway descriptor. If there are multiple products on the order then the transaction descriptor will be set from the first product with a descriptor.

API Dynamic Description

3. Import an order with a custom descriptor. Use the customDescriptor parameter on Import Order or Import Upsale API. A custom descriptor will override both gateway and product descriptor. The custom descriptor is not saved on the order. The custom descriptor is not used on rebills. Subsequent viewing of the order in CRM will not display the custom descriptor.

API Documentation