Project Transactions can be matched automatically as well as manually with a supplier invoice. In order to automatically match project transactions they should be included in an invoicing advice and the invoicing advice should be entered in the Inv. Advice Ref field. It is possible to enter only the invoicing advice reference in the supplier invoice without entering a purchase order reference. The net amount of the supplier invoice will be compared with the total amount of the invoicing advice and matched with the relevant project transactions included in the invoicing advices. A new posting line will be created for any difference within the tolerance levels specified. If the Always Create Tolerance Posting option is enabled on the Invoice/General sub tab in the Enterprise/Supplier/Supplier page, a posting will be created regardless of whether it is within the tolerance level.