An old drawer may reveal a Premium Bonds holder’s number. It may contain a passbook with a former address. You may also find a letter in a name you no longer use.
You may know the money still exists. However, you may not know whether you lost an account, missed a prize, or need to handle another person’s investment.
Tracing lost NS&I investments usually means using NS&I’s official tracing route. Give enough details for NS&I to match its records. These include current and former names, addresses, and your date of birth. Include any NS&I or Premium Bonds numbers.
Lost accounts, unpaid Premium Bonds prizes, and investments owned by someone who died use different processes. So, identify your case first. Use only official NS&I contact details. Be wary of unexpected calls or messages.
First identify the missing money. NS&I uses different processes for holdings, prizes, and estates.
A lost account is an investment you cannot access. An unclaimed prize is a winning payment from a known Premium Bonds holding that has not arrived.
A deceased customer claim is different. It is for an executor or authorised person handling investments owned by someone who has died. It is not a personal tracing request.
Match the problem to the route
| What you are looking for | Best official route | Details that help most |
|---|
| A forgotten NS&I account or bond holding | NS&I tracing service | Old names, addresses, date of birth, account or bond numbers |
| A prize that may not have been paid | Premium Bonds prize checker | Holder's number or NS&I number |
| Money owned by a person who has died | Deceased customer claim process | Death certificate and estate authority documents |
Keep the names of products separate
A lost investment search can find a record. However, it will not usually restore access at once. NS&I will normally confirm your identity first. It may also update old contact details.
Build the details NS&I needs to search
Gather details that let NS&I compare your request with old records.
Create a one-page tracing checklist
Write down your current legal name, date of birth, and address. Also list every former name, spelling, and address used when you opened the product.
Include postcodes and an approximate opening period. Add any NS&I, holder’s, bond, certificate, or account number. Keep proof of name changes ready. This may include a marriage certificate or deed poll. NS&I may ask for it.
Separate proof from secret access data
First, check the official NS&I website for the current tracing route. Then follow the instructions for the product you want to find.
Give your full current name, date of birth, and current address. Next, list former names and addresses in date order. Include postcodes where you can.
Add the approximate year when the investment was opened. Attach or quote details from old records. These may include a certificate reference, NS&I number, or Premium Bonds holder's number.
If you have no paperwork, provide the strongest name and address history you can. This can help NS&I separate lost savings from another customer’s records.
Use the official route and protect your data
Use only contact methods that you check yourself on NS&I’s website.
Start at National Savings and Investments. Then use its contact or tracing options. Do not use links in adverts, texts, or emails.
The prize checker looks for unpaid prizes using a holder’s or NS&I number. However, it cannot trace every account. After a possible match, NS&I may need identity documents or updated details. It may need these before restoring access, releasing money, or changing an investment.
1. Classify
Lost holding, prize, or estate.
2. Prepare
Names, addresses and numbers.
3. Verify
Open NS&I directly.
4. Confirm
Complete identity checks.
This method does not replace a deceased customer claim. Use that claim when the investment belongs to someone who has died. An executor may need probate or other estate authority under the Administration of Estates Act 1925. This method also does not apply if you only forgot a password. In that case, use NS&I's normal online access process if you still know your account details. An attorney with a Lasting Power of Attorney should use NS&I's authority route. They should not make a personal tracing request.
Choose online, phone or post
Choose a contact method based on the details you have. Also follow the route shown on NS&I’s own website.
Online is often the easiest starting point. This applies where a tracing or product-specific form is available. It is especially useful if you have clear details from old bond holdings or saved letters.
Telephone can help when you need to find the right process. However, never give passwords, PINs, or one-time security codes during an unexpected call.
Post may suit cases where NS&I asks for original or certified documents. It may also help if you cannot use digital services. Before calling or writing, get the address or number directly from nsandi.com. Do not use an advert, search result, or message.
Know what happens after a match
A successful search does not mean money will be paid immediately. NS&I may ask for identity checks. It may also ask for proof that links a former name to your current name. You may need to confirm a replacement address before access is restored.
Once ownership and contact details are confirmed, the next step depends on the product. You may be able to view the holding online. You may update payment instructions or keep the investment. You might withdraw eligible funds or consider reinvestment in an available NS&I product.
For Premium Bonds holdings, make sure payment details are current. Also use the official Premium Bonds prize checker for unclaimed Premium Bonds prizes. If the record belongs to someone who died, the deceased customer claim process takes priority. Estate authority documents also take priority.
What people ask
How do I trace a lost NS&I investment?
Use NS&I's official tracing route. Give your current and former names, addresses, date of birth, and any account numbers. Your search is stronger if you include an approximate opening date. Include the old address linked to the product too.
Can I check unclaimed Premium Bonds prizes?
You can check unclaimed Premium Bonds prizes with the official prize checker. You need the holder's number or NS&I number. This checks prizes, not every forgotten NS&I account or certificate.
How long should my old address history cover?
Include every address used when you may have held the product. Include addresses from 5 to 20 years ago. List addresses in date order. This helps NS&I compare them with older paper records.
Will NS&I release money as soon as it finds it?
No. NS&I normally needs to verify your identity first. It may also need updated personal details before releasing or moving money. Finding a record confirms a possible match. It does not give final access approval.
What matters most:- Classify the missing money as a lost holding, unpaid prize or estate cl
## Frequently Asked Questions
### How do I trace a lost NS&I account?
Use NS&I’s official tracing service and provide as much identifying information as possible. This can include your current and previous names, date of birth, former addresses, and any account, holder’s, or bond numbers found on old paperwork. NS&I can then check whether it holds investments in your name.
### Is an unclaimed Premium Bonds prize the same as a lost NS&I account?
No. A lost NS&I account means you need to locate an investment or account record. An unclaimed Premium Bonds prize means the bonds are already known, but a prize payment has not been received or claimed. Check unclaimed prizes using the official Premium Bonds prize checker or your NS&I account.
### Can I trace NS&I investments belonging to a deceased relative?
Yes, but this follows the deceased customer claim process rather than the standard lost-investment tracing route. The person dealing with the estate will normally need to provide the deceased customer’s details and evidence of their authority, such as probate, letters of administration, or other documents requested by NS&I.
### Should I use a company that offers to find my lost NS&I money?
It is usually best to contact NS&I directly through its official website or published contact details. Be cautious about unsolicited calls, emails, or messages claiming to have found money for you, particularly if they ask for fees, bank details, passwords, or identity documents before explaining the claim.
| Situation | What you are trying to find | Official NS&I route | Useful details to provide |
|---|---|---|---|
| Lost NS&I investment | An account, certificate, or holding you can no longer locate | NS&I tracing service | Current and former names, date of birth, previous addresses, account details |
| Unclaimed Premium Bonds prize | A prize that was won but not received | Premium Bonds prize checker or NS&I online account | Holder’s number, NS&I number, bond number |
| Deceased customer’s investment | Savings or bonds held by someone who has died | Deceased customer claim process | Full name, date of death, address, investment details, estate authority |
| Old Premium Bonds paperwork | Whether bonds remain held and whether prizes are due | NS&I Premium Bonds services | Holder’s number, bond records, previous addresses |
Alan White
With over 15 years of experience helping individuals navigate savings and investment options, this author provides clear, practical guidance on ISAs, Premium Bonds, and alternative savings products. Every article on ISA vs Premium Bonds draws on real-world experience, offering actionable advice, risk awareness, and strategies to help readers make informed decisions, plan for savings goals, and understand tax and legal implications. The goal is to empower readers to confidently manage their money and maximise their financial growth.
Disclaimer: The information on this website is for general informational purposes only and does not constitute tax, legal or financial advice. Content is based on publicly available sources and is intended to explain general principles of UK savings and investment products. Tax treatment and investment suitability depend on individual circumstances and may change over time. We do not guarantee the accuracy, completeness or suitability of the information. Always consult the latest official guidance or a qualified financial adviser before making any financial decisions.
