If a customer is no longer going to be using PayRecs, while we'll be sad to see them go, it is a very simple process to remove their access.
In Q2 Central, disable the PayRecs entitlement for the specified customer. This will trickle down to any user entitlements as well and prevent any access to PayRecs for that customer.
The orange warning icon(see screenshot) will indicate that the customer no longer has access to PayRecs.