This parameter is optional and is only used when you have several e-commerce Merchant IDs (MID) within the same network and when you wish to select a different Merchant ID (MID) depending on the payment.
If this parameter is not specified or absent, the payment will be made with the Merchant ID(s) according to the priority order defined in the Merchant Back Office (Settings > Shop > MID association tab).
The possible networks are:
In order to force the MID to be used:
In order to forbid the payment on a specific network:
|* Subject to availability via your financial institution