If you're an esure customer and you want to cancel your policy, you can do so by contacting their customer service team. To cancel by phone, call 0800 056 8173 and press 4 for the cancelations department. You'll need to give them your policy number, and they'll give you a cancellation reference number. You can also cancel online by logging in to your account and going to the "My account" section, or by emailing cancellations@esure.com. Be sure to include your policy number in the email. Lastly, you can cancel by post by sending a letter to esure, The Equinox, 19 Cadogan Street, Glasgow, G2 2AE. Make sure to include your policy number and cancellation reference number in your letter.