Payer Authentication Templates {#templates-matrix-pa}
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`Payer Authentication` templates specify the payer authentication services that a merchant account will accept. To specify a payer authentication service, enter the acquirer ID in the associated field. This template supports the following payer authentication services:

Visa Secure with EMV
:
The Visa card type uses Visa Secure with EMV as the authentication service. The acquirer ID is a text string that consists of 6 to 20 digits and starts with the number 4.

Mastercard/Meeza Identity Check
:
The Mastercard card type uses Mastercard Identity Check as the authentication service. The acquirer ID is a text string that consists of 6 to 20 digits and starts with the number 5 or 2.

American Express SafeKey
:
The American Express card type uses American Express SafeKey as the authentication service. The acquirer ID is a text string that consists of 11 to 20 digits and starts with the number 1.

Cartes Bancaires Fast'R
:
The Cartes Bancaires card type uses Fast'R as the authentication service. The acquirer ID is a text string that consists of 6 to 20 digits and starts with the number 4, 5, or 2.

Discover / Diners Club ProtectBuy
:
The Discover / Diners Club card type uses ProtectBuy as the authentication service. The acquirer ID is a text string that consists of 6 to 20 digits and starts with the number 3 or 6.

Elo Compra Segura
:
The Elo card type uses Elo Compra Segura as the authentication service. The acquirer ID is a text string that consists of 4 digits. The acquirer ID is a text string that consists of 8 digits and starts with the number 1.

JCB J/Secure
:
The JCB card type uses J/Secure as the authentication service.

UnionPay 3D Secure
:
3D Secure is a protocol designed to be an additional security layer for online credit and debit card transactions. The acquirer ID is a text string that consists of 6 to 20 digits and begins with the number 4, 5, 2, or 6.