Enclosures and Annexures in Official Letters: How to Attach Documents Correctly

Introduction

Attachments are one of the most common sources of delay in administrative work. A clear enclosure/annexure list helps the receiving office verify completeness quickly, route the file correctly, and avoid repeated requests for missing documents.

When to Use

Include an enclosure or annexure list when you are attaching:

• applications and supporting certificates
• identity/address proofs (where required)
• prior correspondence for reference
• reports, statements, or approvals
• evidence for complaints/representations

Format / Structure

Enclosure vs annexure (common usage)

Enclosure commonly refers to any document attached with the letter.

Annexure is often used for structured supporting material, especially when there are multiple pages or a longer submission. Some offices use both terms interchangeably.

Important: Because practices differ, follow your office’s terminology. The content rule remains the same: list attachments clearly.

Recommended enclosure list format

Use a numbered list:

1. [Document name] — [date/identifier if relevant]
2. [Document name] — [date/identifier]

If a document is long, you may add:

• “Pages: __”
• “Annexure-A / Annexure-1” (if your office uses annexure numbering)

Step-by-Step Guide

1. Make a complete list of attachments before drafting the final letter.
2. Mention an attachment in the body only if it is genuinely necessary for understanding or decision-making.
3. Add the enclosure list at the end of the letter.
4. Ensure the enclosure list matches the body references exactly.
5. If sending digitally, ensure filenames match the enclosure list (where practical).

Examples (Illustrative)

Illustrative enclosure list:

Enclosures:

1. Copy of [document] dated [DD/MM/YYYY]
2. Proof of [item] (ID: [identifier])

Illustrative annexure numbering:

Annexures:

• Annexure-A: [document name]
• Annexure-B: [document name]

Common Mistakes

• Writing “as attached” without listing the documents
• Listing enclosures that are not actually attached
• Mentioning an enclosure in the body but missing it in the final file/package
• Not including key identifiers (date/reference) when there are multiple similar documents

Best Practices

• Use a numbered list for clarity.
• Add identifiers for documents that can be confused (dates, reference numbers).
• Keep the letter short; move long details into annexures when appropriate.
• Maintain privacy: do not include unnecessary personal data.

FAQs

Is ‘enclosure’ mandatory in every official letter?

Only if you are attaching documents. If there are no attachments, you can omit the enclosure section.

Should I write ‘Encl:’ or ‘Enclosures:’?

Both are common. Use your organisation’s preferred style and be consistent.

Related Articles

• Official Letter Writing Guide
• Official Letter Format and Structure
• Official Letter Checklist (Before Sending)

Related Templates

• Official Letter Template
• Forwarding Letter Template

Related Formats

• Official Letter Format

Related Glossary

• Enclosure
• Annexure
• Reference Number

Try this in LetterKraft (CTA)

Generate a letter and automatically keep your enclosure list consistent with what you attach.

• Templates: Document Templates
• Letterhead-ready PDFs: Letterheads

Related Ecosystem (optional but recommended)

• Solution: Official Correspondence
• Industry: Municipal Corporations
• Comparison: LetterKraft vs Traditional Templates