There are two possible transactions to use here. They are FB03 and FBV3. The first shows all posted document types. This is the best choice if you think the document has been posted to you actual balance. The later shows only parked documents that have not yet posted to your expenditure balance. These documents are still encumbrances. It is the best choice if you are trying to find which documents are still awaiting completion or approval.
This transaction is very similar to the FBV2 transaction used with P-Card reconciliation and marking parked documents complete.