Did Luft Victory Verification become stricter during WWII?

[Rob Romero]

To quote a previous poster:

“I think that later (1941-42? Not my domain.) German claims and RLM-confirmations became much more accurate, possibly because Göring et al realized what was going on, needed accurate statistics on enemy losses and didn't want EVERY single fighter pilot to walk around with the Knight's Cross around his neck (hence, too, the creation of the “Deutsches Kreuz”, a KC “brake”), and certainly were angered by wrong claims.”

1) Does anyone know when the Abschusskommission (Victory board) was established to verify Luftwaffe victory claims?
2) Were these modified or made more thorough after the initial campaigns of the Europoean War?

Thanx

Rob Romero