The UPS Store mailbox services have many locations providing 24-hour access to your mail. On the website you can also file a claim or request a refund for shipping. Sample Insurance Cancellation Letter Lovetoknow Lettering Letter Sample Life Insurance Policy Print custom forms online. How to cancel po box . Take your keys and some ID to any post office. Buy stamps and shop. A PO Box is only available during business hours. PO Box - The Basics - FAQ USPS. Add or remove names. If you wish to cancel your PO Box or PO Box Plus service please notify a staf member at your Post Ofce and present suitable identifcation. We accept shipments from any carrier so that you dont have to worry about missing one. St Suite Houston Texas 77008 United States. Pay the 105 identity verification fee. Complete the Alter or Cancel form PDF 512kb and lodge it in person at the Post Office please bring ID with you if youd like to. Use the USPS websites Email Us form. You can now man...