ALL teachers that have Qualif. with a recognised Regist, Soc. are themselves registered,( I have numbers which may be checked with degree of level )

many of these are easily checked out ( the Soc. will gladly oblige... it promotes their " brand " ).

Teachers who are " chain " school cert. , are a whole different matter. Not impossible to check, but sometimes the background for their training is very obscured .

And by the way, must commend you on your due diligence !