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Is there a policy per browser or is it an automatically the client receives notice from server?

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closed as not a real question by Xavierjazz, Diogo, Indrek, 8088, Nifle Aug 28 '12 at 6:27

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

How could the browser decide to change the cookie? – David Schwartz Aug 27 '12 at 23:13

A cookie changes as often as the server changes it and the browser accepts it. While the browser sends the cookies for each request, the server may send or withhold setting a cookie with the response as it desires.

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