Subject Line
Also known as: Subject, Sub
Definition
A short line in an official letter that states the purpose and topic of the letter so it can be understood and routed quickly.
Definition
A subject line is the one-line description of what your letter is about. In official correspondence, it helps the receiving office:
- route the letter to the correct section
- understand the requested action quickly
- index the letter for future reference
Purpose
- Makes the letter action-ready at a glance
- Reduces delays caused by unclear routing
- Improves traceability in filing and record-keeping
Usage (Best practice)
- Keep it one line where possible.
- Use action-first patterns: “Request for…”, “Submission of…”, “Reply to…”, “Clarification on…”.
- Add dates/reference identifiers only when they reduce ambiguity.
- Keep tone neutral (especially for complaints/representations).
Examples (Illustrative)
- “Request for leave from [DD/MM/YYYY] to [DD/MM/YYYY]”
- “Submission of [document name] dated [date]”
- “Reply to your letter dated [date] regarding [topic]”
Related Articles
- Official Letter Subject Line Examples
- Official Letter Format and Structure
- Official Letter Writing Guide
Related Templates
Related Formats
Last updated