Under which circumstance can an endorsement be added to the signature page of a naval letter?

An endorsement can be added to the signature page of a naval letter when there is sufficient space on that page to accommodate the entire endorsement. This is significant because endorsements are meant to provide additional information or clarification regarding the letter, and to be effective, they need to be clearly visible and connected to the letter itself. If there is not enough space, the endorsement may not be legible or might lead to confusion regarding its relation to the main content of the letter.

Having adequate space ensures that the endorsement is an integral part of the communication, maintaining the clarity and professionalism required in naval correspondence. It also prevents the need for rewriting or modifying the document in a way that might compromise the original structure or information conveyed in the letter.