In the world of postal communications, certain addresses carry more significance than others. One such address is PO Box 11114 Chelmsford CM99 2DG.
Many UK residents and businesses have received official correspondence from this location and are often unsure about its origins. Whether it’s an investment update or a policy document, the mystery surrounding this PO Box frequently raises questions.
This blog aims to demystify PO Box 11114 Chelmsford by exploring who owns it, why you may receive mail from it, and what steps to take next.
What Is PO Box 11114 Chelmsford CM99 2DG?

PO Box 11114 Chelmsford CM99 2DG is a designated business mailing address used for secure and official correspondence. It serves as a central postal point where individuals and institutions send or receive important communications.
This PO Box is not linked to residential usage but is specifically tied to a corporate or financial entity. The address ensures consistency in mail delivery, particularly when high volumes of correspondence are involved.
Organisations that deal with sensitive client information often use PO Boxes to safeguard privacy and simplify postal operations. It also provides an added layer of identity security and convenience.
What Does the CM99 2DG Postcode Represent?
The CM99 2DG postcode refers to a non-geographic postal region located in Chelmsford, Essex. Unlike standard residential postcodes, CM99 is primarily used by organisations and businesses for operational and administrative purposes.
It doesn’t correspond to a street or a walk-in office, making it ideal for mail handling services. The designation “99” in the postcode typically indicates a PO Box or a specific sorting area, further confirming that it’s used for managed business communications.
Chelmsford, as a location, is known for its strong financial sector presence, which makes it a strategic spot for mailboxes serving investment firms and financial institutions.
Why Is PO Box 11114 Chelmsford Frequently Used in Financial Correspondence?
PO Box 11114 Chelmsford is widely used in financial correspondence because it offers a secure, consistent, and regulated method for handling large volumes of sensitive communication.
Financial firms, especially those managing client investments, must ensure all contact is traceable and compliant with industry regulations.
Columbia Threadneedle Management Limited uses this PO Box to manage mail related to:
- Investor Relations: Official updates, account statements, and policy documents are sent from this address to maintain clear communication with clients.
- Regulatory Compliance: Financial services are legally required to provide clients with written updates and disclosures, which are often delivered via PO Box.
- Junior and Individual Savings Accounts: Documents linked to JISAs and ISAs are commonly processed through this address.
The PO Box also serves as a central hub for receiving and responding to client inquiries. Using a designated address helps the company streamline operations while maintaining confidentiality and trust in every financial exchange.
Who Does PO Box 11114 Chelmsford Belong To?

PO Box 11114 Chelmsford is linked directly to a well-established investment management company. It is used by Columbia Threadneedle Management Limited, a part of Columbia Threadneedle Investments.
This firm handles a broad portfolio of assets across multiple markets, and the PO Box serves as a dedicated contact point for investors. It enables correspondence related to Individual Savings Accounts (ISAs), Junior ISAs (JISAs), and investor inquiries.
The use of a PO Box also aligns with their regulatory obligations and data security standards. This ensures that client communication is handled securely, professionally, and consistently without relying on physical office visits.
Why Are People Receiving Letters from PO Box 11114 Chelmsford?
Many people receive correspondence from this address due to their direct or indirect involvement with investment products or services.
Investor Updates and Notifications
Clients with active investment accounts, including ISAs or JISAs, often receive updates, performance summaries, and notifications via post. These are typically routine and serve to inform about the performance of assets or regulatory changes.
Regulatory or Compliance Notices
Financial firms are required by law to send regulatory documents, disclosures, and compliance statements to their clients. Receiving such letters does not necessarily indicate a problem but ensures that the institution remains transparent and accountable.
Responses to Customer Enquiries
If someone has recently contacted the company regarding their investment account or submitted a complaint or inquiry, the response will usually be routed through this PO Box. It acts as a return address for official communication to ensure traceability and efficiency.
Should You Be Concerned If You Receive a Letter from This Address?

Receiving a letter from PO Box 11114 Chelmsford CM99 2DG is usually not a cause for concern. It’s often related to investment updates, policy documents, or customer service communications.
To ensure it’s legitimate, check for:
- Your full name and accurate account details
- A valid customer reference number
- Language consistent with previous correspondence
If anything looks suspicious, such as unfamiliar requests or poor formatting—avoid responding. Instead, use official contact methods (e.g., company website or verified phone number) to confirm authenticity.
While most letters from this PO Box are genuine, scammers may try to mimic official addresses. Stay cautious, but if the content aligns with your dealings, there’s typically no need to worry.
How Can You Contact Columbia Threadneedle or PO Box 11114?
Reaching out to the organisation behind PO Box 11114 is straightforward. They provide several contact options for inquiries, policy questions, and account-related issues. The table below outlines the verified contact information for Columbia Threadneedle Management Limited:
| Contact Method | Details |
| Phone (UK) | 0330 123 3798 |
| Fax | 0845 113 0274 |
| account.enquiries@columbiathreadneedle.com | |
| Mailing Address | PO Box 11114, Chelmsford, CM99 2DG |
| Communication Hours | Standard UK business hours (Mon–Fri) |
Always make sure to contact them through the verified details and avoid sharing sensitive information unless you’re confident you’re speaking with an authorised representative.
Conclusion
PO Box 11114 Chelmsford CM99 2DG is a trusted and officially registered postal address used by a leading investment management firm. It plays a key role in delivering secure, professional communication between the company and its clients across the UK.
Most letters received from this address relate to account management, investment updates, and customer support. As long as you are involved with any investment or savings products, receiving such mail is normal.
However, it’s always advisable to stay vigilant, verify sources, and store financial documents securely for future reference and peace of mind.
FAQs About PO Box 11114 Chelmsford
What type of company is Columbia Threadneedle Investments?
It is an investment management firm offering financial solutions across multiple asset classes. They manage investments for individuals, institutions, and corporations.
Can the same PO Box be shared by multiple financial entities?
Yes, it is possible for multiple divisions of the same parent company to use the same PO Box. However, PO Box 11114 is primarily used by Columbia Threadneedle.
Is CM99 2DG strictly for outgoing mail or does it accept incoming as well?
The address is used for both incoming and outgoing mail. It serves as the central communication hub for the investment firm.
How can I check if the letter from CM99 2DG is authentic?
Review the contact information and customer reference on the letter. You can also verify it by calling or emailing the company directly.
Is it normal to receive annual policy letters via a PO Box?
Yes, especially for financial or investment accounts, annual policy updates are commonly sent from registered PO Box addresses.
Where is Columbia Threadneedle’s head office located in the UK?
Their UK head office is located in London, although they use the Chelmsford PO Box for mail handling. The company also operates globally.
What industries commonly use PO Boxes like CM99 2DG in Chelmsford?
Financial services, legal firms, and government bodies often use PO Boxes in Chelmsford for secure and regulated communication.