The required anti-forgery cookie “__RequestVerificationToken” is not present

Question

My website is raising this exception around 20 times a day, usually the form works fine but there are instances where this issue occur and I don\'t know why is so random.

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Answer 1

Ran into similar issue recently. The anti-forgery cookie indeed was missing, so (as others pointed out) either

1. the server did not add the cookie to request, or
2. the browser rejected it.

In my case, it was the server: I was not using SSL on local environment, yet in web.config I had the following line:

Solution in this case is to either switch to SSL, or keep the value set to 'False' for local environment.