The VCTNMTHD (valuation method), ADJUNITCOST (adjusted unit cost) and QTYONHND (quantity on hand) fields were added to the Inventory Purchase Receipts (IV10200) table on Microsoft Dynamics GP 9.0. All receipt layers posted on versions earlier than that version would not have these values populated with the exception of 1 layer.
When you convert your data from Release 8.0 to Release 9.0 or 10.0, we will populate these 3 fields on the most recent (by received date), unsold receipt layer. This is done on a per item basis and we call this 'stamping the record' because the valuation method is now 'stamped' on that receipt.
This record becomes our starting point so that if you post a transaction whose receipt date is prior to the date of the receipt that the conversion stamped, we will treat that new receipt layer like a receipt that was posted on Release 8.0. The VCTNMTHD, ADJUNITCOST, and QTYONHND will not be populated.
For example say the conversion process stamped a receipt layer whose date was March 15, 2010. A receipt transaction dated March 14, 2010 or earlier would be treated like a Release 8.0 layer and would not have the VCTNMTHD, ADJUNITCOST, and QTYONHND fields in the IV10200 populated. However, a receipt dated March 15, 2010 or later would have those populated.