Is there a way to Identify Potential Scammer who claim stuttering overcome?

Is there a way to Identify Potential Scammer who claim stuttering overcome? After noticing discussion in this group, i found mostly people think stuttering is for lifetime but some celebrities or youtuber or people around us share their success with stuttering I read some research & books on stuttering & everyone has different beliefs. Group also restrict discussion about real cure if someone is posting. So if we want to overcome it & need someone's help then how to differentiate real one vs scammer.