Kelly Clark The Lady in the Pew offers some great advice on discerning the authenticity of a Catholic organization....

The next time somebody tells you he’s affiliated with a “Catholic” organization, ask him where it’s listed in The Official Catholic Directory, published by P.J. Kennedy and Sons. (Your local library, and probably your rectory, has a copy: it’s huge!) If he can’t answer you? Well, then you have your answer.

Another tip-off that the organization probably isn’t “Catholic” can usually be found in the name itself. If the group’s name indicates that it is, for example, “Faithful,” or “Concerned,” or “comprised of `Leaders’” or — yikes — has a “Voice,” then watch out......

Check it out. She makes a lot of sense.
(The only thing I might add is, the Kennedy Directory isn’t just huge - it could break your foot should you drop it. Work it with two hands - over a desk............Why do I say this? Experience is a great teacher!)