When setting up a new customer from a template (prototype), by default this can have a parent customer to factor invoices to. This is potentially useful if you want to quickly add retail customer details, but not flood your financials with hundreds of one off cash accounts.
With this in place you keep the customer record on the trading system (Merchanter) for pricing, marketing, historical lookup, but all the invoices go to the financials under a single cash account.
How to setup Parent Customer link
Customer Prototype Overview
either edit existing Cash Customer Prototype, or Create a new Prototype record
Under - Account Information
Tick - Does this prototype have a parent customer?
Select a parent customer - typically CASH, CASHA, ZCASH
There will be a warning if you try to set a credit parent to a cash customer (or vice versa)
Save and Close