What to do if a client threatens to write a dishonest review because you refuse to see them again?

Your other reviews will override any "one time stupid" review. If you don't want to see him again, DON'T SEE HIM! Do not give into his blackmail attempt.

As with any attempts at blackmail, the moment you show hesitation, you lose.

The topic of dishonest reviews comes up often. Reputable providers are not tarnished by the "one-off" review. The experienced hobbyists will see right through it.

I'd like to see them take the sucker down

END OF MESSAGE

Not only do I agree that she should forward the email to Admin, but that she should go a step further and put him on notice that she has done exactly that, and THEN she should block his number and email.

I do agree that a single "one-off" review should not hurt her business, but there are only so many bad reviews that the "market" will ignore. Why should she sacrifice her "free one" so that the next guy that comes along and threatens to write a second bad review might actually have the potential to damage her business?  

This is her livelihood. She should take steps to protect herself and her reputation.

He says:

"This is her livelihood. She should take steps to protect herself and her reputation."

It sounds as if you have more in mind than merely "she should block his number and email."  If you are suggesting nothing more than that, fine, but those two steps would do nothing to protect herself and her reputation.

Providers are vulnerable because:

1) Jerks know where they have done incall.  (Her most recent review states she was in long-term stay hotel in a Chicago suburb);

2) If a provider is still at the location where the blackmailer saw her, he can attempt to "out" her to facility management and stake out the location to confront her when she leaves her room or later damage her vehicle.  (This is one reason that most experienced providers change hotel/motel locations every few days.)

Her physical well-being is the most important concern.  If her purse does not already contain pepper spray, a referee whistle, and a flashlight, she should buy them.  A self-defense class would also be in order.

Chicago Life Lesson 305:  It is better not to piss off a male who may be one of the many gun-possessors in Cook County.  (She does not say if she grew up in Chicago and if the blackmailer was some guy she knew from the neighborhood.  If so, her risk is even higher.)

Current number of murders in Chicago: 137 (Jan-date, 2016)

Signed,
Glad That I No Longer Live There

-- Modified on 3/30/2016 4:18:23 PM

Does anyone here think he'd have a good time is she was blackmailed into seeing a client against her will?  
It's up to her if she takes preemptive action against this threat by informing TER admin.  She's certainly be within her rights to do so.  I'm not sure it's the best move on her part.  She will have to step up security, screening, change locations & other protective actions...    
If he goes ahead with his threat, she'll be within her rights to Advise on the provider's board AND expect himself to be Black Listed.

If he doesn't follow through with HIS threat, no harm no foul, no one will ever know except him and her. TER is not going to contact him regarding this, it's just better to get on record BEFORE he writes a fake review than be forced to be reactionary after the fact. Preventing a fake review from ever being posted in the first place is much better than having to fight to get it taken down.

As for blocking him, I would think that considering he is trying to blackmail her, that part would be a no brainer.