Hello - I was asked by an auditor if my team can post an AP invoice to a previously closed period. in Sage 500.  Always assumed 'no', but an AP staff member was able to post to a prior period once they 'accepted' the 'posting to a prior period' warning.  Is there another step or steps I need to perform to lock down a prior period? I do keep the GL open for any prior period adjustments but have assumed this wouldn't enable AR or AP modules to post to previously closed periods.  Any help?  Thanks!