SAP Message QA312 - A category &1 inspected certificate is required

Diagnosis
An inspected certificate must exist at the first goods receipt for apurchase order item.

Procedure
Check whether a suitable certificate exists for the purchase order anddelivery, and create a certificate record with the status "Certificatechecked and stored".
If there is no certificate or no suitable certificate, this does notcomply with the requirements in the material master record. If there isno inspection lot for this goods movement, the system posts thequantity to blocked stock or does not post the goods receipt.
If you have created an inspection lot, the system marks the certificatecheck with the status "In lot". You must confirm the availability of aninspected certificate by the time you make the usage decision.