If I understand your question correctly, Cookies are created in server side and stored in client side. if cookie you have stored in client side expired, then it wont come with request. so no need to delete the cookie from request.
Joined: Nov 23, 2010
so, I have a 'samplepage 'with
1.that jumps to server
2.there I delete cookie server side , but that i not deleted until whole thing comes back to client,
that is, whole page is loaded, then on the end cookie is deleted, that is how I see it.
3. hence logoff link is stil visible, when I come back to same page,allthough it should not be
4. proof:click browser refresh, and logoff is gone
Edit: upper thing might be wrong, but anyway,
If at the time beeing at server side I 'delete' cookie from response, I would like to read somewhere that it is deleted,
the best thing seems to be to check current request, which still has it.