What it is
STANREC 4812 is a NATO Standardization Recommendation, Edition 1, dated 9 July 2019. A STANREC is built the same way a STANAG is, with one difference that matters: a STANAG is an agreement nations ratify and commit to implement, a STANREC is a recommendation they are free to take up. STANREC 4812 makes that difference concrete: nations "are invited to use the Allied standard(s) covered by the STANREC and to provide feedback to the NSO on the use of the covered Allied standard(s)" - an invitation, not a ratified obligation.
What it recommends
STANREC 4812 carries no audit procedures of its own. Its aim, in its own words, is "to list recommended practices regarding: Contract audit services between NATO countries or between NATO organisations and NATO countries in connection with non-competitive or single source defence contracting." The one thing it recommends is a single document: "AACP-02, Edition C." Under OTHER RELATED DOCUMENTS it names nothing further ("None"), and it names no earlier edition it replaces: "This STANREC does not supersede any document." Everything about how a contract audit is actually planned and conducted lives in AACP-02, not in this covering STANREC.
Who is behind it, and how it is kept current
The tasking authority is the CNAD Life Cycle Management Group (AC/327). The STANREC is reviewed "in accordance with AAP-03," with the result "recorded within the NATO Standardization Document Database (NSDD)," rather than against a fixed date printed in the document itself. Under USE, "Member or partner nations and NATO bodies should provide feedback to the NSO on the use of Allied standards covered by a STANREC" - the reporting runs from the nations back to the NATO Standardization Office (NSO), not the other way round.
Where it has force, and where it does not
STANREC 4812 addresses nations and NATO organisations arranging contract audit services for non-competitive or single source defence contracting, not a supplier or contractor directly. It binds nobody by itself: whatever a contractor ends up doing about a contract audit follows from a contract that calls up AACP-02's practice, or from a national programme separately choosing to apply it, not from this recommendation existing. It is a NATO non-classified document, "to be handled in accordance with C-M(2002)60," free of charge, and its reproduction restriction is lifted for member or partner nations and NATO commands and bodies.
How it is checked
STANREC 4812 names no certification body, no government quality assurance arrangement, no notified body, and no self-declaration scheme. The only assessment it describes is aimed at the document itself - the periodic review under AAP-03, recorded in the NSDD - not at an organisation, a product, or a specific contract audit. Whatever check a contractor's involvement in a NATO contract audit actually gets is set by whichever nation or NATO organisation applies AACP-02 to a given contract, and that check sits outside this STANREC entirely.