Receiving an unfamiliar letter can be unnerving, especially when it comes from a cryptic address like PO Box 75773 London. Is it something important or just another scam?
Many people across the UK ask the same question when they see this postcode on an envelope. It’s not tied to a high-street business or visible office, which adds to the mystery.
However, digging deeper reveals a specific and important use for this address. In this article, we’ll walk you through who uses it, why it exists, and how to respond to such mail safely and confidently.
What Is PO Box 75773 London?
PO Box 75773 is a secure, government-assigned post box used for processing official communications. Unlike traditional addresses tied to a physical property, this PO Box is not publicly accessible and is managed through a central Royal Mail delivery hub.
It’s used for specialised communications, usually involving confidential information like tax documents or benefit updates. The lack of a visible office or branding is by design.
Its role is to serve as a dedicated mail channel for government departments requiring high volumes of secure correspondence with UK citizens and residents.
Why Does It Use the SW15 9HP Postcode?
The postcode SW15 9HP belongs to the London Borough of Wandsworth and is designated for non-residential PO Box use, specifically under Royal Mail’s management.
The SW15 9HP postcode is used for:
- Centralised processing of HMRC documents and forms.
- Confidential mail like tax assessments, benefit eligibility, and refunds.
- A location with no physical building access to the public.
- Managing mail security and efficiency for large-scale national departments.
- Reducing delays by filtering all inbound government communication through a single location.
This postcode appears regularly in relation to HMRC services, confirming its association with national government use.
Who Uses PO Box 75773 London – A Company, Government, or Scammer?
PO Box 75773 is officially used by HMRC (Her Majesty’s Revenue and Customs). It’s a government-managed mailbox for specific departments like Self Assessment, PAYE, Tax Credit, and Child Benefit.
Public data tied to this postcode confirms multiple government departments are associated with it. There is no evidence linking this address to private businesses or scam organisations directly. Due to the absence of a street-level presence, it may appear suspicious at first glance.
However, PO Box 75773 is a centralised and secure channel used for handling official tax and benefits correspondence across the UK.
Why Did You Receive a Letter from PO Box 75773 London?
If you’ve received mail from this PO Box, it likely means HMRC is trying to communicate with you regarding a tax-related matter. These are often automatic responses, reminders, or important updates.
Possible reasons include:
- You’re due to submit a tax return.
- There’s a change to your PAYE or National Insurance records.
- You’re receiving a Child Benefit or Tax Credit update.
- You have underpaid or overpaid on your taxes.
- HMRC requires additional verification or documents for assessment.
- You’re being notified of a fine or penalty for a missed deadline.
In some cases, people receive such letters without expecting them, which may mean:
- You’re listed as the contact on someone else’s file.
- Your address is mistakenly used.
- You were selected randomly for review.
Review the letter carefully to determine the reason, especially if you’ve interacted with HMRC recently.
Is PO Box 75773 London a Scam or a Legitimate Mailing Address?
PO Box 75773 in London is a 100% legitimate mailing address officially associated with HMRC, the UK’s tax authority. However, some people become concerned when they receive mail from this address due to a few common factors.
The envelopes often lack detailed sender information, and the letters themselves may have a generic format that doesn’t feel personalised. Additionally, the non-residential postcode can make the correspondence seem impersonal or suspicious.
It’s important to note that while scammers do impersonate HMRC, the PO Box 75773 address itself is authentic. The real threat comes from fake letters that appear to be from HMRC but are not.
To ensure a letter is genuine, always check for valid reference numbers, official HMRC formatting, and trusted branding inside the document. If unsure, contact HMRC directly to verify the legitimacy of any communication received.
What Should You Do If You Suspect a Scam from PO Box 75773?
Receiving a letter from an unknown PO Box can understandably make you pause, especially when it lacks clear branding or demands urgent action.
If you’re unsure whether the communication is from HMRC or potentially fraudulent, it’s important to take the right steps to protect yourself.
Inspect the Letter Closely
Genuine HMRC letters will contain formal headings, references to tax years or National Insurance numbers, and clear instructions. Check for:
- Misspellings or inconsistent grammar
- Logos that appear pixelated or misaligned
- Urgent requests for money or personal data
Any of these can indicate a scam attempt.
Verify the Contact Information
Use only HMRC’s official website to verify contact numbers and return addresses. Do not trust phone numbers or emails printed within the letter unless confirmed through gov.uk.
Avoid Providing Any Personal Information
Even if the letter looks official, never share:
- Bank account details
- National Insurance number
- Login credentials
HMRC does not request this type of information via post unless you’re already in a secure process with them.
Report Suspicious Mail Immediately
If you still have doubts, don’t throw the letter away just yet. Report it using one of the following options:
- Action Fraud (National Fraud & Cyber Crime Reporting Centre)
- Royal Mail Scam Mail Reporting
- Citizens Advice consumer service
Save the envelope, take photos, and keep a digital or printed copy of the letter. You might need these for future reference or investigation.
How to Contact Royal Mail for Information About PO Box 75773?
While Royal Mail does not publicly share who rents a specific PO Box like 75773, they can help guide your concerns about suspicious or unusual letters.
This includes mail using the SW15 9HP postcode, which is connected to HMRC’s central operations.
Ways to Reach Royal Mail for Assistance:
- Phone Support: Call their customer service helpline on 03457 740 740, available Monday to Saturday.
- Online Enquiry: Visit their official website and fill in a customer service form regarding your concerns.
- Visit a Local Delivery Office: If you prefer in-person help, take the letter to your nearest Royal Mail delivery depot and ask for verification advice.
- Use the Scam Mail Service: Royal Mail offers a Scam Mail reporting service where you can:
- Email them at scam.mail@royalmail.com
- Send suspicious items to: FREEPOST SCAM MAIL
- Request a scam mail report form by phone
What You Can Expect?
Royal Mail will not confirm the PO Box user, but if your concern is legitimate, they may escalate it internally or help you submit a report to the correct body. Their goal is to ensure mail integrity and protect the public from postal fraud or impersonation.
Can You Report Suspicious or Unsolicited Mail from SW15 9HP?
Yes, and doing so is one of the most effective ways to combat fraudulent activity using postal addresses like PO Box 75773.
While SW15 9HP is tied to official government mail handling, scammers may still try to mimic such addresses to confuse recipients.
If the letter you’ve received:
- Requests payment details
- Pressures you to act quickly
- Involves a service you don’t recognise
…it’s time to raise the alarm.
You can report unsolicited or fraudulent mail through several trusted channels:
- Action Fraud via their online portal or phone line
- Royal Mail’s Scam Mail team
- The Information Commissioner’s Office (ICO), if it involves misuse of personal data
- Citizens Advice, for help with next steps or escalation
When reporting, always try to provide:
- A scanned copy or photo of the letter
- A clear explanation of your concerns
- Your contact details for follow-up
The more detail you provide, the easier it will be for investigators to determine whether it’s a scam or an internal error by a legitimate agency.
Should You Be Worried If You Keep Getting Mail from PO Box 75773?
Getting repeated letters from PO Box 75773 London can feel concerning, especially if you’re not actively engaged with HMRC services.
While the address is officially linked to tax-related communication, there are a few reasons you might be receiving persistent mail.
Common Scenarios Include
- You are on HMRC’s active database due to a recent or ongoing tax matter
- Your address was used during a previous tax submission or benefit claim
- Someone may have mistakenly entered your address in their forms
In most cases, receiving several letters isn’t dangerous, but it could indicate a records mismatch or administrative oversight.
What You Should Do?
- Contact HMRC directly to request a review of your personal records
- Ask them to confirm whether your address is correctly linked to any open cases or benefit applications
- If the mail is addressed to someone else, mark it as “Not at this address” and return it via post
It’s also a good idea to monitor your credit file through services to rule out any unauthorised activity associated with your name or address.
Staying proactive helps ensure your details are secure and government departments are using the correct contact information.
Conclusion
While PO Box 75773 London might look suspicious at first glance, it is a genuine government-used address primarily for HMRC communications.
Tied to the SW15 9HP postcode, it handles Self Assessment, PAYE, Tax Credit, and Child Benefit correspondence. If you receive mail from this address, it’s most likely safe and important.
However, stay vigilant about impersonation attempts and always cross-check details with official government sources. Understanding who uses this PO Box helps you stay informed, protect your data, and respond appropriately to legitimate or suspicious mail.
FAQs About PO Box 75773 London
Can I find out who owns a PO Box in the UK?
No, Royal Mail does not disclose PO Box ownership publicly, except through legal or police requests.
Is receiving a PO Box letter a sign of identity theft?
Not necessarily, but if it seems unrelated to your activity, contact HMRC to verify your data hasn’t been misused.
Are all Royal Mail PO Boxes private and anonymous?
Most are private and used by businesses or government offices for secure handling of sensitive mail.
How can I stop receiving anonymous mail in the UK?
You can return it marked “Not known at this address” or report it through Royal Mail or Action Fraud if it feels suspicious.
What does the SW15 9HP postcode cover geographically?
It is used for PO Box operations in the London Borough of Wandsworth and is not tied to a street-level property.
Can scammers legally rent a PO Box in the UK?
Yes, although Royal Mail screens applications, some scammers may still use them; most scams use fake or imitated PO Boxes.
What’s the difference between a PO Box scam and phishing?
PO Box scams involve fake letters sent by post, while phishing scams use emails or websites to steal personal details.
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