How to use this site

You’ve heard of ‘Who Called Me’ websites for looking up telephone numbers?

Welcome to ‘Who Wrote Me’ for looking up business envelopes!

Use the details on the outside of the envelope to discover what might be inside.

Handy if you’d like to know what some post could be about without being able to open it.

Because you do realise that opening post in somebody else’s name, even where you might now own the property, might considered an offence under the Postal Services Act, and I quote: “(3)A person commits an offence if, intending to act to a person’s detriment and without reasonable excuse, he opens a postal packet which he knows or reasonably suspects has been incorrectly delivered to him“, not to mention Data Protection [GDPR] implications.

So, no more holding it up to the light. No more steaming it open. No more looking through the address window.

Suspicious parent or family member? Nosy neighbour? Private Investigator? Researcher? Whatever your purpose, this may just be a handy resource for you.

  • Envelope details are contained in ‘posts’ – one envelope description per post.
  • Browse the list of posts below, or search for a keyword using the Search feature at the footer of the page.
  • Keyword searches may be a part of an envelope return address, printed code, or other text from the envelope.

Who am I? How can you contact me? See the ‘Who Are We’ section under the menu.

Seeking more detail…

Unfortunately some submissions don’t quite make the cut due to quality or lack of detail. Can you help to complete them? Comment below if you have more detail on the below items….

13/01/22 – PO Box 140 Normanton WF6 1YA – Thanks for your submission, but with this Return Address you need to also provide the detail of what was inside the envelope so that we can share this information to help others!

30/08/20 – PO Box 60 Chester CH1 3BE – Lloyds Bank “Collections Centre” – Thanks for this – good to tie a PO Box to a Sender, but we need to know about the Envelope that correspondence comes in.

03/04/20 – PO Box 187 Havant PO9 5TL – UK Mail – Small window envelope: Thanks for the extra detail today – I’ve now added this as a full entry. Just need to improve it with some envelope details…

25/01/20 – PO Box 140 Normanton WF6 1YA – UK Mail – Finance related: Thanks for trying, but you need to tell us the Sender.

16/01/20 – PO Box 10565 51 Saffron Road – “Important confirmation of set-up”: Thanks for trying, but we need to know the Sender. I do have an entry for this road address but different PO Box. Possibly this is Barclaycard?!

08/01/20 – Jarow NE32 9AN – Brown with window, code on back is ANN/BT/SU0917: Thanks for this one, but just need a bit more clarification on Sender and Contents.

16/09/19 – PO Box 4501 Radstock UK BA3 9A – Thanks for trying, however when submitting new entries, you/we need to know the Sender and Contents in order to create a useful post to help others that don’t know

29/08/19 – PO Box 16764 Birmingham B2 2NL – Thanks for this but we need to know the Sender and Envelope Description to make the submission useful for others.

PO Box 311 Redhill Surrey RH1 1YH

Who might have sent this post:

Willis Ltd

Which carrier delivered it:

Royal Mail

What could be the nature / purpose of the contents:

Company Pension Statement



Description of the envelope:

White DL sized envelope; Return address printed on front under address window; “Private & Confidential” printed above window; “Delivered by Royal Mail” logo; Royal Mail postage paid code PHQ7630

Disclaimer: These details are one example of the contents of an envelope to one recipient at one point in time. There is no assurance that all envelopes with these details carries the same contents. You should not rely upon the information on this website for making any business, legal, or personal decisions. makes no representations or warranties of any kind, expressed or implied, about the completeness, accuracy, or reliability with respect to the website or the information that the website holds. Any reliance upon the website information is therefore strictly at your own risk. will not be liable for any false, inaccurate, or incomplete information presented on this website.

Update – December 2021

Whenever I post an update note on this website I always have to start with an apology. Inevitably its because I’ve neglected the site for a long time. This update is no different. Its been two years – over the course of this global pandemic – it seems that I’ve neglected this. But now, I’ve found the time, space, and motivation (two of which is a result of a new home desk set-up) to give this site some attention. I’ve sifted through 3000 spam comments to pick up the ones that are legit; Updated the site plug-in’s; Tidied up a few things; and even posted a new envelope detail. I also see that we have some excellent new submissions, which I’ll process next. I can’t promise that I’ll keep up this new effort by giving it daily attention, but I will try (once again) to get it – and keep it – fresh. A couple of years ago the site peaked at around 30,000 visitors a month. Looking at Google Analytics now, its getting around 1,500 visitors a month. A massive drop from its peak, but still impressive and surprising given that it’s been neglected for a couple of years. Credit to the search engines for still giving it some recognition. Thank you to everyone that has visited – I hope you got some kind of value it.

PO Box 4501 Radstock BA3 9

[Nice submission – many thanks! I’ve introduced a new “Junk / Unsolicited” category for this. I think part of the postcode is missing – anyone has information to be able to complete it?]

Sender: Ox Living – Co-living redefined

Carrier: Whistl

Category: Junk / Unsolicited

Nature of Contents: Unsolicited advertising

Envelope Description: White C5, Return address on front

PO Box 5012 Coventry CV3 9ED

Who might have sent this post:


Which carrier delivered it:

Royal Mail

What could be the nature / purpose of the contents:

Current Account Statement



Description of the envelope:

White A5 window envelope, “Private and Confidential” on front, with circular HSBC-style logo; Rear has “Private and Confidential” with PO Box address.

7 Tufton Street London SW1P 3QB

[I like this one – quite unusual, and I think the first in the ‘Charity’ category – many thanks!]

Sender: National Churches Trust

Carrier: Royal Mail

Category: Charity

Nature of Contents: Charity begging letter [ed. Not my words!]

Envelope Description: White A5 window envelope, a “fat one”; Front: Franked Royal Mail “Postage Paid GB SOUTHALL376”; Back: If undelivered please return to: NCT, 7 Tufton Street, London, SW1P 3QB

Brecon House Caerphilly

[Thank you for this entry, and as I always do, my apology for the wait in adding it to the site]

Sender: Link Financial (but we are advised that Brecon House is a multi-occupancy office, therefore many other different businesses may also be using this address – not just the ‘Debt Collection’ business that was confirmed as using this envelope).

Carrier: Royal Mail

Category: Financial

Nature of Contents: Debt Collection

Envelope Description: White franked window envelope; Royal Mail C9 10002; Return Address – Brecon House Caerphilly Business Park Caerphilly CF8 3GG

PO Box 123, DE14 2XE

[This is a great submission – many thanks! But I believe I’ve had this address before – an entry dated 14 March 2019, but with a different Sender Interesting to see a Solicitors Firm operating with a PO Box – is this typical practice? Maybe the owner/operator of the PO Box is some kind of shared service on behalf of multiple small businesses? Also taking this moment to acknowledge another recent submissions , “LBG PO Box 204”, but without Sender details it’s no good. Remember – this site needs to know the Sender and Contents of the envelope to aid other people that do not know, so without these details, the submission is meaningless – sorry!]

Royal Mail

Envelope Detail:
Front: Delivered by Royal Mail C9 10087, Private & Confidential; Back: Return Address: PO Box 123, Burton on Trent, DE14 2XE

Howard Cohen & Co. Solicitors LS3 1AB

Legal / Public Services

Nature of contents:
Order from Court

PO Box 117 BLYTH NE24 9EJ

[Wow, excellent submission – many thanks! Grrrr, I sure do hate Parking Eye. I appreciate that they serve a need, but often the implementation and execution of their service makes my blood boil. To acknowledge that I’ve had other submissions over the past few weeks that I’ve not posted here on the site – sorry but they lack the envelope detail that this site aims to provide. Please use the below as an example of what I’m looking for]

Royal Mail

Envelope Detail:
White C5 Window
Right of window; long narrow barcode (no numbers)
Top right; Royal Mail logo C9 10002
Back: Top, centred; If undelivered please redirect mail to: Return Address PO Box 117, BLYTH, NE24 9EJ
Top right; OUT-CPE-P6-0419

Parking Eye

Civil Enforcement

Nature of contents:
Fine – Parking Charge Notice