Mail theft is not uncommon, as for years the practice of stealing cards from suppliers while in possession of the USPS has been prevalent. Most often, theft occurs as the result of a very organized crime operation. The problem is especially daunting for financial institutions and insurance companies that regularly send out millions of letters containing new and replacement credit cards, reimbursement checks, and policies. This paper dives into how delivery information can help monitor and understand anomalies in delivery events that could relate to a mailpiece being stolen.