Supplier Refund Receipts
This article explains that within ExpensePlus, you can choose whether supplier receipts are 'required' or 'optional'.
If set to 'required', then all supplier refunds that are entered (whether via the purchases screen, or via the match transactions screen) will be shown within the receipts screen as awaiting a receipt, until a receipt is either provided or is marked as lost and then authorised as lost.
If set to 'optional', then all supplier refunds won't require a receipt, however, one can still be added.
To adjust supplier receipt settings, go to System Settings > Receipts Settings and under the 'receipts' section, you can change the setting by selecting the 'edit' button to the right (as shown below).
To help you better understand the Receipts module as a whole, please visit the module overview page here.