Signing up online with NS&I can be useful, but it does not turn every holding into a digital account. If you are buying Premium Bonds, opening an ISA, tracing an old record or considering the Investment Account, the right route depends on the product and what you need to do.
Choose NS&I online or post by your actual task
Choose the route that matches your product and task, not the route that looks quickest. Online registration suits eligible holdings that NS&I can match to your current details; a postal route is for products or instructions that require a signed form, including the Investment Account.
| Your situation | Best starting route | What not to assume |
|---|
| You want new Premium Bonds | Use NS&I’s current buying route | Buying bonds does not always create an NS&I login |
| You hold bonds but cannot sign in | Register or recover access, depending on your record | That a second profile will solve the problem |
| You need to locate an old holding | Trace the existing record with NS&I | The holding has vanished because login fails |
| You operate an Investment Account | Follow the current postal instructions | It can be managed through online access |
Which route fits your situation?
Use online services when NS&I says that your product supports them and your personal details match its records. Use post when the current form says to do so, when NS&I requests a signature, or when the product is run by post.
Is it a new product or an old holding?
A holding is simply the savings product recorded in your name, such as Premium Bonds or an ISA. If you have letters, prize notifications or a holder’s number, you may already have a holding and need recovery rather than a fresh application.
Online access is not the only remote service route. NS&I may also provide telephone support or telephone servicing for certain customers, products and instructions, but the available actions can differ from those offered through an NS&I online account. For example, a customer who cannot complete Premium Bonds online access because their address has changed may need to speak with NS&I to establish the correct next step, rather than opening another profile.
Before calling, keep any NS&I reference number, Premium Bonds holder’s number and previous address details nearby. Always check NS&I’s current contact guidance, opening times and security process before relying on telephone service for a particular request.
Opening, access and tracing are different journeys
Opening a product creates a holding, online access lets you manage an eligible holding, and tracing finds a holding NS&I already records. Each route may ask for similar details, but they have different purposes and different checks.
A reference number helps identify a record, but it does not prove who is asking to change it. NS&I may need identity verification before it connects an online profile to a holding.
Search your papers for NS&I letters, certificates, old addresses and any Premium Bonds holder’s number. If details do not match, ask NS&I how to trace or update the existing record instead of making repeated online attempts.
If you think you already hold an NS&I product, treat the issue as NS&I account recovery before trying repeated online account registration attempts. A letter, certificate, prize notice, old passbook-style record or holder’s number may show that there is an existing holding even where you have never used digital services. Ask NS&I how to trace an NS&I holding if you cannot identify the product or if the details on screen do not match your current name or address.
This is especially useful after a move, a name change or many years without contact. A recovered record may then need updating and identity checks before online access can be considered.
Register online only for products NS&I supports
Register online only where NS&I confirms online servicing for that product; the Investment Account is administered by post. Applying for or holding that account does not create online management access, even if you can sign in for other NS&I products.
Have your full legal name, date of birth, current home address and any NS&I reference ready. Use the exact details on your records, as a prior surname or old postcode can matter.
Postal forms and the investment account
For a postal application, complete the latest form, sign it and send it to the address printed on that current form. Keep a complete copy and proof of posting in case NS&I needs to query a section.
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A document organiser can keep NS&I letters, form copies and posting receipts together while a postal request is being handled. It is useful when old holder numbers or address history are needed later.
- Keeps a signed-form copy separate from the version sent to NS&I
- Stores Premium Bonds references and address-change evidence in one place
- Makes it easier to find proof of posting if NS&I asks follow-up questions
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This guidance is less relevant if you only need to check Premium Bonds prize results, already have working online access, or are choosing between savings products rather than deciding how to administer an NS&I product.
Prepare information in two groups before starting. To match an existing record, have your full name, date of birth, current address, earlier names or addresses where relevant, and any NS&I reference number or Premium Bonds holder’s number. For an NS&I postal application, read the current postal application form carefully and provide only the identification, address evidence or supporting documents it specifically requests. NS&I identity verification requirements can vary according to the product, the instruction and the details it needs to confirm.
Do not assume that a document accepted for one request will be accepted for another, and do not send original documents unless NS&I expressly asks for them.
Questions & answers
How do I register my Premium Bonds online at NS&I?
Register online through NS&I if your Premium Bonds are eligible and its records can match your details. If registration fails, do not keep creating profiles; check whether you need to trace an existing holding or update an old address.
Can I register for NS&I without an NS&I number?
You may be able to start without a reference, but NS&I may need other details to find or verify your record. Use the current NS&I route and contact it if you hold older bonds or have changed name.
What documents can I send to NS&I by post?
Send only the documents listed in NS&I’s current form or request. Identity and address evidence can change, so do not post passports, driving licences or originals without a direct instruction.
Can I get Premium Bonds help at the Post Office?
A Post Office branch cannot be assumed to handle every Premium Bonds task. Premium Bonds are issued and administered by NS&I, so check NS&I’s current guidance before visiting a branch.
Why will NS&I not let me register online?
Online registration can fail when your name, date of birth or address differs from NS&I’s record. Old postcodes, changed surnames and incomplete holder numbers are common causes, not proof that the holding is lost.
Is the Investment Account available through my NS&I online account?
The Investment Account is administered by post, so an NS&I login does not give online management for it. Follow the current postal form and terms for any request concerning that product.
What matters most:- Opening an NS&I product, getting online access and tracing an old record are separate tasks.
- Use online services only when NS&I confirms that your product supports them.
- For a postal form, use the current version, sign it, retain a copy and keep proof of posting.
- The postal-only Investment Account does not become digital because you hold another NS&I product online.
Further reading
If you want to learn more about this topic, these sources may interest you:
