Assignment Codes are used to attribute commission items to a rep, they are an integral part of commission calculation and every item must include one. Assignment Codes can contain any combination of letters and numbers. They are created when the commission item is created, so basically made when you either import a spreadsheet or transfer them over from another RPM subscriber.
When mapping your commission spreadsheets/transfers to your suppliers you will be required to choose a source for the Assignment Code, you should choose a data set that you would use to assign deals to your agents. In most cases our recommendation is to use the account number as data sets can be mapped to more than one field in RPM.
Each Assignment Code belongs to a single supplier and Assignment Codes are assigned to a single rep, and if not assigned they are labeled "unassigned".