NS&I complaint?

Do you have a dispute or a bad customer experience with NS&I? Report it through our website to maximize the chance of getting it resolved.

We help you write an effective complaint in minutes. Our AI models are trained on thousands of effective complaint letters. Then we push it through emails, social media, paper complaint letters and other tools at our disposal. And you are not alone: our helpful community is there for advice.

Call NS&I customer service on 08085 007 007 from the UK or email customerenquiries@nsandi.com, NS&I's customer enquiries address; the NS&I contact page also lists the opening hours, a number for calling from abroad, a virtual assistant for general questions and the postal address in Sunderland. Have your NS&I number, holder's or customer number and any account, Bond or certificate numbers ready.

Prize, withdrawal or bereavement payment to chase? Begin your complaint here in parallel: we push it out to NS&I by email, social media and printed letters.

To make a complaint to NS&I, call its complaints team on the number given on the NS&I contact page, email customerenquiries@nsandi.com, or write to NS&I's customer address in Sunderland rather than the London head office. Give your full name, address, phone number, your NS&I or account number and any complaint reference, then say what went wrong and what you want NS&I to do, and sign any letter. NS&I's email route does not accept attachments, so send copies of documents by post and keep the originals.

Want every reference and date set out in one place? Put it through our complaint process: we help you write it in minutes, drawing on complaint letters that actually worked.

To claim NS&I savings after someone has died, use NS&I's online bereavement claim, which does not need an online account, or ask NS&I for a paper claim to complete by post. NS&I asks for the customer's full name, addresses, date of birth and date and place of death, the executors or administrators, the types of account held, your own details and the bank account for payment; for larger estates it may also ask for a grant of representation. Premium Bonds can stay in the prize draws for a period after the death, and any prizes are held until the claim is complete.

Executor or next of kin with an NS&I claim to settle? Our trained AI opens a case for you and keeps advising on what to send NS&I and when to push.

Yes: in the UK, the Financial Ombudsman Service handles complaints about NS&I savings and investments, such as Premium Bonds, savings accounts, bonds and certificates, and about its service. The Financial Ombudsman Service generally expects NS&I to have had the chance to put things right first, so keep a record of every call, letter, email and reference number.

Prize sent to the wrong account? We put the case together and place it alongside other savers reporting the same problem.

Nothing has been reported about NS&I here yet. Our research shows what typically goes wrong at large savings providers: withdrawals and repayments that arrive later than expected, online accounts locked after a failed login or a forgotten NS&I number, Premium Bonds prizes sent to a closed bank account, maturing bonds renewed on terms the saver did not pick, and bereavement claims that take a long time to settle for an estate.

Prize payment sent to a bank account you closed? Be the first to report it: your case opens the record for the next saver who runs into the same problem.

Your complaint gets its own public page on Complain.biz and we get to work: we bring it to the attention of NS&I through emails, social media, paper complaint letters and other tools at our disposal.

And we stay with it after you file. Our trained AI opens a case file for you and keeps coaching: what to reply, when to push again, and how to escalate if nothing happens.

Yes. We have an active community of consumers, and complaints here are public: people who ran into the same problem with NS&I can give you advice or back you up with their own story. A complaint with a community behind it is much harder to overlook.