Here’s one: A Boy, An Injury, A Recovery, A Miracle?
The Catholic Church has developed the strictest guidelines to determine whether there is any possible scientific explanation for miracles of this kind. If there is none, we have a situation where science cannot explain what has happened. What next?
When such miracles happen in connection with very clear prayers asking for the help of a holy person has died, the Catholic Church is willing to approve the interpretation of these events as the will of God to canonize a saint.
So there are instances which cannot be explained, and faithful people see God’s power at work in a healing.
There are also charlatans of the worst degree. There are certainly scam artists who use slight of hand, audience stacking, and fast-talking in order to rip people off. These are incredibly dangerous, not just because they are liars and thieves, but because some people may forego medical treatment in order to afford and spend time with faith healers. (Notice in the article I cited, the boy’s family was aggressively pursuing every medical option available.)
My personal advice: If someone is advertising a faith cure, accepting money for it, and/or advising to avoid legitimate doctors, RUN AWAY!!!