How to Write a Letter and Address an Envelope in Singapore
The Singapore Postal Code Format
Every address in Singapore uses a six-digit postal code, such as 100044 for Telok Blangah Drive. SingPost, the national postal operator, uses this number to route your mail. Memorise that number and you are already halfway to a properly addressed envelope.
Finding the Right Postal Code
Before you write anything, you need the recipient's exact code. You can find it quickly using Postalcode.info for Singapore postal code search — just type the street name or block number and the correct code appears. Do not guess or copy an old code from memory. Take ten seconds to verify. If you are sending within Singapore, this step is simple. If you are sending from abroad, you still use the same code — the address layout does not change, only the country line gets added.
Laying Out the Envelope
Follow this table exactly, top to bottom, and your envelope will be easy for SingPost to read.
| Line | What goes on it |
|---|---|
| Line 1 | [recipient name] — the person or company name |
| Line 2 | [street and house number] — road name plus block or unit number |
| Line 3 | Singapore [postal code] — the word “Singapore” followed by the six digits |
Here is a complete example with placeholders — replace the brackets with real details:
[recipient name]
[street and house number]
Singapore 100044
For the official rules on alignment and punctuation, refer to the SingPost official addressing guide before you seal the envelope.
Structuring the Letter Itself
The envelope is only half the job — the letter inside matters just as much. A clear structure helps your reader respond faster and reduces back-and-forth. Begin with the date and your location at the top, then open with a polite greeting such as “Dear [name]”. The first sentence should state your purpose plainly. For example, “I am writing to request a refund for order [number]” works better than burying the point in background. Then write the body with one idea per paragraph. Keep sentences short. End with a closing formula like “Yours sincerely”, followed by your signature and printed name. If you are unsure how to phrase something, you can ask a free AI chat to draft the letter and then edit it yourself — but always rewrite it in your own voice. After drafting, run the text through a word and character counter to check the length fits the occasion. A business letter should be under one page, while a personal note can be shorter. Finally, use a free AI grammar checker to proofread the letter before printing — a single typo can undermine your credibility.
Checklist Before You Post
- Postal code matches the recipient's address exactly — verify it with our lookup.
- Line 1 has the recipient name, spelled correctly.
- Line 2 has the street and house number, no missing digits.
- Line 3 reads “Singapore [six-digit code]” with no extra words.
- If sending abroad, the country name is on its own line below the postal code.
- The letter inside has a date, a clear purpose, a closing, and your signature.
- You have proofread the letter once out loud — or used a grammar tool.
- If you used a draft from AI, you have edited it so it sounds like you.
The Universal Postal Union sets the global rules, and their guidelines can help you format an address for any destination. When in doubt, check the official SingPost guide for local mail, and always double-check the postal code before you drop the envelope in the post.