Listed below are the key rules that apply to receipting items in PECOS P2P and can be used as a trouble-shooting guide.

• Items can only be received after a document has been fully approved.
• Receipting cannot be performed until the order has been transmitted to the supplier.
• It is not possible to cancel or delete a receipt record after it has been saved but it is possible to edit receipts.
• It is possible to record an item in the receipt that was not on the original purchase order (using an ad hoc line).
• Editing (updating) a receipt is not possible once it has been interfaced to your finance system on the ReceiptReturn Export.
• Updating a receipt is not possible if it is in the workflow process. 
• It is possible to reverse the receipting for all lines of an order.
• It is not possible to process a negative receipt quantity for individual order lines.
• Receipt date and quantity are mandatory for all receipts.
• The date of the receipt cannot be entered as a future date (i.e. current date and prior only).
• When 3-way matching is employed, the receipt quantity is used to match with the invoice quantity.
• Matching tolerances are available for receipt quantities and may be set at category code (UNSPSC) or item level.
• Receipt tolerances are set as percentages and not fixed values.
• A warning message will be displayed for each line of an order that is being over receipted. This does not prevent an over receipt being transacted.
• It is possible to select any date from the interactive calendar: dates selected in the future are not validated.
• If your organisation uses decimal quantities, these can be used for receipt quantities.