Opencart version:  3.0.2.0

With the Unique customer payment method module, some of the installed payment methods can be linked to a particular customer.

So, if your payment method is off (so it does not appear to be available as default), but you've been assigned to the signed-in customer in the admin, it will appear as a possible payment method.



Example: If we have an agreement with a particular partner to pay by post-paid (8-day) bank transfer, but we do not want all customers to receive this option, then:

   -  install the payment method

   - turn off the payment method

   - assign the customer the desired payment method (Admin-Customers-Edit   Unique Payment Methos Tab) 

   - allow the customer the desired payment method