How frequently should 1st class mail weighing over 13 oz be handled?

The correct handling of 1st class mail weighing over 13 oz is that it is not accepted as 1st class mail. According to USPS regulations, the maximum weight for 1st class mail is 13 oz. Once any piece of mail exceeds this weight limit, it cannot be categorized as 1st class. Instead, it must be shipped using alternative services, such as Priority Mail or other package services that accommodate heavier parcels.

Understanding this point is crucial for accurately processing mail and ensuring compliance with postal regulations. This knowledge helps retail clerks identify the proper classifications for various mail pieces, ultimately enhancing customer service and operational efficiency.