Correct way to delete cookies server-side

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Sending the same cookie value with ; expires appended will not destroy the cookie.

Invalidate the cookie by setting an empty value and include an expires field as well:

Set-Cookie: token=deleted; path=/; expires=Thu, 01 Jan 1970 00:00:00 GMT

Note that you cannot force all browsers to delete a cookie. The client can configure the browser in such a way that the cookie persists, even if it’s expired. Setting the value as described above would solve this problem.

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