Geico cancellation fax number for Illinois is (updated by George Behr on 05/01/) GEICO Emails to Cancel eff 11/1/ (below) Region 1 . This is the address you’ll send your cancellation letter to. What’s the best way to cancel Geico insurance? and to a Geico representative is the fastest way to cancel your policy. by mail will take longer. If you’re in a hurry, call Geico at
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(308) 588-1215879
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