Hi ​@kimia ,

You may refer below documentation link to understand the whole process of Matching Supplier Invoice with Purchase Order.

https://docs.ifs.com/ifsclouddocs/25r1/SupplierInvoicing/ProcessSubMatchSuppInvPurchOrd.htm?StandAlone=true

Related to your question, I found this section in the above documentation: “This process requires that IFS/Purchasing is installed and that purchase orders have been entered. You can match invoices with purchase orders which are yet to be registered as arrived. Once the purchase order is registered as arrived the invoice will be automatically matched with the purchase order”.

Regards,
Kethaka

​@kimia you can have the invoice header with the PO with PrelPosted with values, however the receipt line needs to be created for the actual matching of the receipt PO line and posting.

Yes, you can match Invoice with Released Status PO / Line. But to complete the invoicing and payment process the receipt has to be made. 
This question usually comes with new customers where they ask should we be receipting PO lines related to services (which are No Part Lines or Non-Inventory Lines) which are not received by the warehouse staff as there is no physical goods coming. 
Short answer in all services PO lines have to be receipted for a 3 way matching.