What is the general purpose of a directory card in mail handling?

A directory card in mail handling serves as a useful tool to represent a list of recipients. This card typically contains essential information such as names, addresses, and possibly additional details pertinent to mail delivery. The purpose of maintaining a directory card is to ensure that mail clerks have quick access to the information needed to send or sort mail efficiently.

By having a clear list of recipients, mail clerks can streamline the process of organizing and delivering mail, as they can easily reference who is supposed to receive what. This systematic approach helps reduce issues like misdelivered mail and improves overall workflow. While other choices may involve aspects of mail handling, none encapsulate the central role of a directory card as effectively as representing a list of recipients.