If you have lost the KL reference keys to your mailbox or letter box, then Post Boxes UK can help. Simply send an email to [email protected], with the following information: KL reference mailbox key number Your name and delivery address We will then forward an invoice to you and upon receipt of payment we can despatch the replacement keys to you same day (for orders before 2pm). Alternatively you can order online on our secure webshop. Availability - ex-stock. Please note that orders for KL reference keys cut to code cannot be returned for refund. Should you require any further information, please call Post Boxes UK today on +44 (0)1922 218218. Alternatively, your enquiry can be emailed to [email protected] Thank you.