When is it appropriate to use form letters in correspondence?

Using form letters in correspondence is most appropriate for routine communication because they allow for efficiency and consistency when conveying the same information to multiple recipients. This type of communication often includes standard messages such as appointment reminders, general updates, announcements, or other information that does not require personalization. Form letters ensure that the essential information is delivered uniformly, making them ideal for scenarios where the message content does not vary significantly from recipient to recipient.

In contrast, personalized updates, unique proposals, and complaint resolution require tailored communication that takes into consideration the specific circumstances or needs of the recipient. These situations demand a more individualized approach to effectively address the specifics of each case, which form letters are not designed to accommodate. Thus, while form letters serve a valuable purpose in routine correspondence, they are not suitable for more nuanced interactions.