Consignment Purchase Orders

We require a method whereby we can place a purchase order for stock items 
for which we expect receipt of stock but that is where the chain of events 
stop.
No creditors invoice will ever be captured against these orders as these 
stock items are managed on behalf of a third party and they only get paid 
once the stock is sold.
At month end we programmatically perform the following on both HPH and 
HPO:
change the status in both HPH and HPO to '3'.
make the qty received and qty costed the same as qty ordered.

The purchasing month end then purges these records.

We would manage this workaround easier if volumes weren't so large but we 
literally have thousands monthly. 
 
Any ideas/input/feedback would be welcomed.
 
Kind regards,

Frank Shaw
Clover Information Services
Tel: +27 11 758 5380
Mobile: +27 82 451 0256
Fax: +27 11 758 5300
Email: frank.shaw@xxxxxxxxxxxx