Correctly identifying Nonmachinable characteristics of First-Class Mail letters helps to protect what?

Identifying nonmachinable characteristics of First-Class Mail letters is crucial for revenue generation. When letters are classified as nonmachinable, they often require manual handling, which can incur additional costs for the postal service. If these characteristics are not recognized and addressed, the postal service could face increased operational expenses due to the need for manual processing, potentially impacting profitability. By accurately identifying and categorizing mail, the postal service can ensure that appropriate fees are charged and minimize the risk of revenue loss. This careful handling of mail also aids in maintaining efficient operations, which ultimately supports the overall financial health of the postal system, contributing to effective revenue generation.