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# Postcode Address File (PAF) and Address Limitations

> ⚡ **Quick Answer:** Royal Mail’s PAF limits 100 addresses per postcode. This only affects postcode lookup services — your mail delivery at **EC2A 4NA** is not affected.

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# What Is the PAF Limit?

The Royal Mail Postcode Address File (PAF) limits deliverable addresses per postcode to **100**. When exceeded, Royal Mail assigns a new postcode by changing the end digit.

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# How This Affects You

* Use **EC2A 4NA** for all correspondence — mail delivery is unaffected
* The limit only impacts the **Royal Mail postcode lookup service** (where you type a company name to find the postcode)
* When the 100-address limit is reached, a new postcode is generated with a slightly different end digit
* Even with a new postcode, you will still receive all your mail

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# Filing a Complaint with Royal Mail

If you wish to raise this with Royal Mail:

1. **Email:** [customer.service@royalmail.com](mailto:customer.service@royalmail.com)
2. **Online form:** [Royal Mail complaint form](https://personal.help.royalmail.com/app/answers/detail/a_id/307/~/im-a-personal-customer%2C-how-do-i-make-a-complaint%3F)
3. **Phone:** 03457 740 740

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# Common Questions

**Will I still receive my mail?**
Yes. Mail delivery is not affected by the PAF limit.

**Do I need to change my postcode?**
No. Continue using EC2A 4NA for all correspondence.

**Why can’t I find my company in the postcode lookup?**
The lookup service only lists up to 100 addresses per postcode. This does not affect mail delivery.

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