It’s not uncommon to receive letters from addresses you don’t immediately recognise, but when that address is a PO Box, like PO Box 4923 in Swindon, it raises even more questions.
Many recipients wonder who the sender is, what the message means, and whether it’s safe or legitimate. If you’ve recently received mail from this PO Box, you’re not alone.
This address is tied to well-known UK financial entities, and understanding the reason behind such correspondence is essential for your peace of mind.
In this blog, we’ll uncover which companies use this PO Box, what kind of messages you might receive, and the appropriate steps you should take in response.
Which Company Owns the Address PO Box 4923 Swindon?
The PO Box 4923 Swindon address is officially linked to Capital One (Europe) plc, one of the UK’s major financial service providers.
Capital One uses this PO Box for handling sensitive communications, especially those related to data privacy and subject rights under the General Data Protection Regulation (GDPR).
If you’ve submitted a Subject Access Request (SAR) or any data-related query to Capital One, this is likely the address they’ll use to reply. Furthermore, EQi, a UK investment platform (previously under Equiniti), also uses PO Box 4923.
They specifically direct customers to use this address for returning signed documentation related to account handling, particularly the third-party information only form. This dual-use setup can be confusing, but both entities use it for legitimate business purposes.
While the PO Box is shared between these financial institutions, each uses it distinctly for correspondence within their area of operation.
So, whether the mail relates to credit, fraud prevention, or investment management, it’s safe to say that PO Box 4923 belongs to trusted entities.
Is PO Box 4923 Swindon Linked to Zurich Insurance?
Despite having a significant operational presence in Swindon, Zurich Insurance is not connected to PO Box 4923. Zurich has its own distinct postal addresses for its Swindon offices, typically tied to internal departments, corporate claims, or broker correspondence.
While some confusion arises due to Zurich’s Swindon location, their contact methods, postal addresses, and service departments are separate from those of Capital One and EQi.
Zurich typically communicates from well-documented office locations or department-specific PO Boxes that are clearly listed on their official website.
PO Box 4923, by contrast, does not appear in any of Zurich’s published contact information or operational directories. This confirms that there is no operational or logistical overlap between Zurich and the companies that do use PO Box 4923.
If your letter has no Zurich branding or references to insurance services, it’s highly unlikely to be from them. Instead, it’s safe to associate PO Box 4923 with data privacy matters, SARs, or account documentation managed by Capital One or EQi.
Why Did You Receive a Letter from PO Box 4923 Swindon?
Receiving an unexpected letter can be puzzling, especially when it’s from an address like PO Box 4923 in Swindon. However, if you’ve received mail from this PO Box, it’s likely related to one of the following valid reasons:
- Data protection correspondence following a Subject Access Request (SAR)
- Confirmation of a request to the Data Protection Officer (DPO) at Capital One
- Updates or clarifications regarding Capital One’s privacy policy or data storage
- Notification about account changes or action items if you’re a Capital One customer
- Acknowledgement of returned forms from EQi related to account management
- Third-party form submission concerning investment account access or authorisation
- Follow-up on suspected fraud or security issues flagged by Capital One’s monitoring system
These letters are typically formal, include references to your account or previous communication, and may request additional information or confirm an action taken.
It’s essential to closely inspect the contents for signs of legitimacy. Check the sender’s name, letterhead, and any reference numbers.
If the message aligns with recent activity on your part, such as contacting customer service or sending in a form, it is likely a standard reply from the organisation.
What Type of Mail Is Commonly Sent from PO Box 4923 Swindon?
PO Box 4923 Swindon is actively used for structured and often regulatory communications from financial companies. The types of mail you might receive from this address can include:
From Capital One (Europe) plc
- Written responses to Subject Access Requests (SARs)
- Letters from the Data Protection Officer regarding data rights or consent
- Notifications involving account verification or activity alerts
- Fraud investigation letters in response to suspicious card usage
- Legal or compliance information relevant to your financial records
From EQi
- Confirmation of form submissions
- Administrative instructions related to third-party access on investment accounts
- Acknowledgement of signed document returns
Common Mail Features
- The letters are usually professionally formatted with official branding
- They may contain reference numbers, personalised salutations, or data protection language
- Envelopes are often plain or discreet, with the PO Box number and no additional markings to protect privacy
These messages are rarely promotional or marketing-related. Instead, they serve a specific, transactional, or regulatory purpose.
Always examine them carefully, especially when the letter includes a request for any kind of response or document submission.
What Should You Do If You Don’t Recognise the Sender?
Receiving an unfamiliar letter, especially from a PO Box, can naturally cause concern. Here’s a step-by-step approach to ensure you handle it safely and correctly:
1. Check for Visual and Brand Cues
Does the letterhead or envelope carry the Capital One or EQi logo? Is there contact information, an official tone, or a clear reason for the letter?
2. Cross-Reference with Your Activity
Think back to any recent requests or online applications. Did you contact Capital One about data privacy, or return any forms to EQi?
3. Verify Using Official Contact Numbers
If you’re still uncertain about the legitimacy of a message or request, contact the company directly using a verified customer service number found on their official website or documentation. Avoid using any contact details provided in suspicious messages.
4. Do Not Act Prematurely
If the sender seems unknown or suspicious, do not send personal documents or reply hastily. Instead, verify authenticity first.
It’s better to delay a reply than to risk falling victim to phishing or fraudulent activity. Taking these steps helps you stay informed and protected.
Does Mail Boxes Etc. (MBE) Manage PO Box 4923 in Swindon?
Mail Boxes Etc. (MBE) is a well-known provider of private mailing solutions and PO Box services in the UK, including a branch in Swindon.
While many businesses use MBE addresses for customer convenience and confidentiality, there is no publicly available evidence that PO Box 4923 is managed or leased by MBE.
Instead, available information shows that this PO Box is directly associated with Capital One and EQi, and most likely registered through Royal Mail’s business services rather than through a third-party provider like MBE.
The mailbox usage here is more regulatory and service-specific, supporting functions like data subject rights and investment account administration, rather than acting as a general business mailbox.
If you are trying to track down who controls PO Box 4923, it’s important to distinguish between PO Boxes managed by Royal Mail and virtual office addresses provided by companies like MBE.
In this case, MBE has no confirmed operational link to this particular address. Reaching out directly to Capital One or EQi is your best course of action for any clarification regarding PO Box 4923.
How Can You Contact the Company Behind PO Box 4923?
If you’ve received a letter from PO Box 4923 in Swindon and want to verify its legitimacy or require assistance, the best step is to reach out directly to Capital One or EQi, depending on which company the letter references.
For Capital One, they offer multiple helplines tailored to specific concerns. Here is a quick reference table to guide you:
| Query Type | Contact Number |
| Online account help | 03444 814 000 |
| Lost or stolen card (UK) | 0800 952 5267 |
| Lost or stolen card (abroad) | +44 115 993 8002 |
| Report account fraud | 0800 952 5458 |
| Report application fraud | 0800 952 5143 |
If your letter includes references to investment forms or EQi, you should log in to your EQi account and use the secure messaging service or visit their contact section online for instructions.
For written communications concerning data privacy, send your requests to: Capital One (Europe) plc, PO Box 4923, Swindon, SN4 4BR
Ensure you include your name, customer ID, and the nature of your request to avoid delays.
Conclusion
Receiving post from a PO Box can feel ambiguous, but in the case of PO Box 4923 Swindon, the source is clear and trustworthy.
Whether it’s a privacy-related response from Capital One or a form acknowledgment from EQi, the mail you’ve received is part of a structured process.
It’s crucial to verify any communication through official channels, particularly when dealing with financial or personal information.
If you’re uncertain, always check for identifiable details and contact the sender directly using published support numbers. By staying informed and cautious, you can handle such correspondence confidently and securely.
FAQs About PO Box 4923 Swindon
What is a PO Box and how does it work in the UK?
A PO Box is a secure postal address that allows companies to receive mail without revealing a physical location. In the UK, these are commonly used for business privacy and secure correspondence.
How do I stop receiving unwanted mail from unknown PO Boxes?
You can mark the mail as “Return to Sender” or contact Royal Mail to stop delivery. Registering with the Mail Preference Service can also reduce unsolicited communication.
Is PO Box 4923 a shared mailbox service or exclusive to one company?
It is not a shared mailbox but is used by more than one company, including Capital One and EQi. Each uses it for different purposes related to customer communications.
Can I track who sent a letter from a UK PO Box?
While PO Boxes hide the sender’s physical address, company branding and customer service lines often help identify the sender. Contacting the companies mentioned can provide confirmation.
Is it safe to respond to letters from unfamiliar PO Box numbers?
Only respond after confirming the legitimacy of the letter through official contact methods. Never share sensitive information if you’re unsure of the sender’s identity.
Do financial and insurance companies often use PO Boxes for communication?
Yes, many financial institutions use PO Boxes to handle regulatory, legal, and customer service correspondence. It ensures efficient sorting and secure handling.
How can I find out more about companies operating from PO Boxes in Swindon?
You can check Companies House, Royal Mail, or the company’s official website. Business directories and consumer forums can also offer insights into company addresses.
