A lost ISA is usually traced through the bank, investment platform, fund manager or share registrar that held it. There is no separate national ISA search. Gather old statements, addresses, previous names and National Insurance details before you make enquiries.
Match each asset to its official search route
Match the asset first to avoid using the wrong search.
Use the route that holds the record
My Lost Account is free for participating banks and building societies. NS&I traces its own products. ISAs, funds and shares usually require a request to the named provider, platform, fund manager or registrar.
| Asset you suspect | First official route | Cost | Usual response time | Limit you must know |
|---|
| Bank or building society account | My Lost Account, then provider direct | Free | About 4 to 12 weeks | Participating firms only |
| Premium Bonds or other NS&I product | NS&I tracing service | Free | Often 4 to 12 weeks | Not for bank or ISA accounts |
| Cash ISA | Bank, building society or ISA manager | Free | About 2 to 8 weeks | No central lost ISA register |
| Stocks and shares ISA or platform | Platform, broker or fund manager | Free | About 2 to 12 weeks | Historic platform names may differ |
| Paper share certificate or fund | Share registrar or fund manager | Usually free to trace | About 2 to 12 weeks | Company may have merged |
| Workplace or personal pension | GOV.UK Pension Tracing Service | Free | About 2 to 6 weeks | Finds contact details, not value |
Build one evidence sheet before applying
List previous names, addresses, postcodes, likely opening dates, known employers, account references and joint holders. Keep certificates, dividend cheques, passbooks and statements. A holder reference can identify a record quickly.
Use the fastest free route first: Submit one careful request to
My Lost Account for participating banks and building societies. Approach NS&I for Premium Bonds. Contact the named provider, platform or registrar for ISAs, funds and shares. A free search is not less valid because it is free. It is usually the route that can verify ownership.
Treat a lost ISA as a provider-held account
Find the provider behind the ISA before you attempt a transfer.
Separate cash ISAs from investment ISAs
A cash ISA may appear in bank papers. A stocks and shares ISA may hold funds, shares or platform cash. Check statements, old emails, tax returns and direct debits. If you remember a transfer, contact both the former provider and the likely new provider.
Choose the route in under a minute
Old passbook or bank name
My Lost Account or bank
Premium Bonds number or certificates
NS&I tracing
ISA statement or platform email
Named ISA manager
Share certificate or dividend cheque
Registrar or successor company
Check the wrapper before withdrawal
Do not close or withdraw from a found ISA until you confirm its type and transfer process. A transfer keeps the wrapper between managers. A withdrawal may affect later tax-free saving unless the ISA is flexible.
Trace shares, funds and inherited holdings
Use the oldest evidence available to prove a holding.
Follow certificates and unpaid dividends
A certificate or dividend cheque can show the company, shareholder reference and registrar. Contact the current registrar through the company's investor-relations page. Contact the successor company if the original business merged, changed name or ceased trading.
Prepare documents for your situation
Send copies only when requested and keep the originals. Estate claims often take longer than normal identity checks.
- Moved home: List each former address and postcode, even if you lived there for only one year.
- Changed name: Give photo ID and a marriage certificate, deed poll or other document linking old and current names.
- Relative has died: Give the death certificate and, where needed, a grant of probate or letters of administration. In England and Wales, the grant confirms who can act for the estate.
- Joint account: Give both holders' details. Ask if the surviving holder can claim alone.
- No paperwork: Give the fullest name, date of birth, former addresses and likely dates. Then ask the known provider for a trace.
Reclaim safely and keep it findable
Confirm the balance or units, legal entitlement and unpaid dividends before you move money. Update contact details and make a private list. Record the provider, product, holder number, last-check date and document location.
Before using any paid reunification service, complete your one-page evidence sheet. Then submit the right free official request. If a company contacts you first, do not share a passport scan or bank details. Check the firm on the FCA Register first. Contact the provider through its own published details.
⚠️ Never send an original share certificate, probate document or passport to an unsolicited caller or email address.
For paper shares or old fund holdings, start by finding the company's current legal name. Do not rely only on the name printed on a certificate. Mergers, takeovers and demergers may move the register to a successor company. They may also move it to a different share registrar.
Use the company's investor-relations pages to confirm the current registrar. Then give the full holder name, former addresses and certificate number. Include dividend warrant details and any holder reference.
Old bank statements may also show dividend payments. If paper certificates are missing, the registrar may ask for an indemnity before replacement. Do not pay for replacement until it confirms that a live holding exists.
Where a person is alive but unable to make the search alone, the provider will usually need proof that the person making the request has legal authority. An attorney should usually give a registered Lasting Power of Attorney. A valid Enduring Power of Attorney may apply in some cases. Give ID for both the attorney and account holder.
A Court of Protection deputy may need to give the court order.
Ask each provider if it has a vulnerable-customer or third-party authority form. A general letter of permission may not be enough. This can apply to a lost bank account, platform account or ISA. Authority to act ends on death. The estate process then applies instead.
Once a match is confirmed, ask for the current balance or number of units. Ask for the account type, charges, restrictions and linked unclaimed accounts or dividends. A lost ISA search should confirm the ISA manager and wrapper type. Do this before giving any instruction.
An ISA transfer can keep the tax shelter. Withdrawing cash first may use subscription capacity. It may also lose protection for future growth.
For non-ISA shares and funds, get a value first. Consider possible capital gains tax or dividend tax before selling. Consolidation can make records easier. Compare charges, investment choices and FSCS protection before moving recovered money.
What people ask
Can My Lost Account find every lost ISA?
No. It covers participating banks and building societies, not every investment ISA.
How do I find a lost Premium Bonds account?
Use NS&I's tracing service with former names, addresses and any holder number.
How long does tracing a lost account take?
Simple cases may take weeks. Historic or estate claims can take three months or longer.
Can I cash in an old ISA as soon as I find it?
No. Confirm its type first, because a transfer may keep the tax wrapper.
What should I do with an old share certificate?
Keep it and contact the current registrar or successor company.
Do I need probate to trace my late parent's account?
You can ask about records. Providers usually need authority before releasing money.
Are paid lost-money tracing firms safe?
Some are legitimate, but use free official routes first. Check firms on the FCA Register.
Does the pension tracing service find the value?
No. It gives provider contact details. The provider confirms value and entitlement.
What matters most:- Use My Lost Account for participating bank and building society accounts. It is not a universal investment search.
- Trace Premium Bonds directly with NS&I. Trace ISAs through the provider behind the wrapper.
- Keep certificates, dividend cheques and former addresses. They are practical proof, not clutter.
- Verify identity, entitlement, tax treatment and protection before moving, withdrawing or combining recovered money.
- Keep an annual asset list. It makes money easier to find after a move or bereavement.
Related sources
These articles can help you explore the topic in more depth:
