Letter carriers who deliver mail in the United States are public servants who uphold their public trust by ensuring the safe passage of the mail. We are career and non-career government employees who take pride in our work, in our nation and in our employer: The U.S. Postal Service. Per a customer's request, the mail carrier will notify an appropriate party of any unusual circumstances (mail not being collected, inactivity in the home, etc.). Assures attention after one or more days of inactivity for socially isolated persons living alone.