It's your call but if she was way different than her pics I would end the session at the onset.

I had a provider who was totally hot in her picks but when she showed up was about 40 lbs heavier than the picks. The worst is she had decent reviews on here. I get what I am seeing in the pics or close to it. I know some are air brushed but come on, I will slam the door next time and leave.

My front door has a lot of glass and I might break a pane. lol

In all seriousness, I would never allow a provider inside the door if she arrived forty lbs heavier and ten years older. If there is any major, and obviously intentional, effort to deceive I will send the woman on her way and the only "tip" she is going to get from me is to be honest in the future. I don't believe in giving a single red cent if the provider IMO is engaging in any type of dishonest advertizing.

Now there is some gray area here, where the lady that shows up is the woman in the pic, but for whatever reason you just don't "click" and you simply don't find her attractive after meeting her in person, but there is no real intent to deceive, she just looks better in the pics. In that case I feel a cancellation fee might be in order, the amount is left to your own good judgement.

I don't believe in "rewardig bad behavior" and guys that think with the little head, ala "well she was there, and I was horny, so I went ahead with the session" do us all a disfavor, and proves to these B&S scamsters that their bad actions will still result in them making money.

This only happened to me once and the gal was actually very hot so I stayed.  I have seen a gal or two that was definitely a few pounds heavier or a few years older but not enough to send me running.  Now, in the case that you described I would leave or ask her to leave. If a lady is deliberately trying to deceive her clients I feel no obligation to reward her with any sort of compensation for doing so. As GGa said, it only rewards bad behavior.

In this day and age there is no excuse for old pictures other than the obvious one-deception.

This has been discussed before and I've included an old thread.  Here are 3 alternatives 1. you can see her, but this just reinforces to the provider she can get away with old pics. If you do this make sure to write  a review and state her pics are old. 2. Slam the door and walk away. 3. if you want you can give her a cancellation fee and then leave. Not sure if you can write a review in this scenario.

You would hope that the last few reviewers would mention the weight can, and the old pictures, but this  is not always the case.

I'm confused by your post. It starts out sounding like an outcall (she visited you at your hotel or other place) but at the end you say that you will slam the door and YOU WILL LEAVE which sounds like you were visiting her incall. (I'm guessing you meant outcall and you will tell her to leave).

Anyway, I only know incall and I think it's probably easier to leave an incall than outcall, even if you're already inside the door with your coat off.

I've only done this at AMPs. In NYC, most AMP incall I know personally use real pics; AMP outcalls have a rep for B&S. I showed up at one place looking for someone I knew from her previous location (her pic on the new location webpage) and they sent in someone else using the same name. I explained that I was looking for "Gina" on the webpage, they said "This is her" and I said, "No, I know that Gina and this girl isn't the Gina on the webpage and you are using someone else's pics without their permission ... etc." and left. Actually, that AMP went out of business. And a few other occasions, but that was the worst.

1-What do you do if the girl behind the door is NOT the girl in the pics?
2-What do you do if the girl behind the door IS the girl in the pics but the pics are not accurate?

The first one is easy. Turn and walk away. This is deliberate deception, and no one who rewards bad behavior does anyone any favors.

The second one presents, as GaGambler said, a gray area. Just how significant is the difference between the girl in the pics and the girl in the flesh? Does the difference involve a deliberate intent to deceive? You simply have to judge for yourself. You have to weigh the significance of the differences and make your decision accordingly. Your response can range from going ahead with the session (being sure to point out the differences in your review), to cancelling with a fee to walking away.