Nationwide Building Society written dispute & complaint mailing address
To send Nationwide Building Society a written dispute or complaint by mail, use Nationwide Building Society, The Complaints Team, NW 2020, Swindon, SN38 1NW. Sending Nationwide a written complaint about an account, card, or service issue, per the address on its own complaints page. This is not a payment address — don't mail a payment here. Include your account number and a clear description of the issue, and keep a copy for your records.
Nationwide Building Society — Complaints Team — written complaints
Nationwide Building Society The Complaints Team NW 2020 Swindon SN38 1NW
Sending Nationwide a written complaint about an account, card, or service issue, per the address on its own complaints page.
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Nationwide Building SocietyThe Complaints TeamNW 2020Swindon, SN38 1NW
Your letter, printed and mailed for you.
Key facts
- This address is for written disputes and complaints — not for sending a payment.
- Nationwide Building Society is a building society.
- If Nationwide hasn't resolved your complaint within 8 weeks, or you're unhappy with its final response, you can refer it free of charge to the Financial Ombudsman Service.
- Include your account number, a clear description of the issue, and any supporting documents.
- PostPal prints your letter and mails it for you — no printer, envelope, stamps, or post office trip.
How to send your letter
- 1
Write your letter
State your full name and account number, the transaction or issue you're disputing (with the dollar amount, if it's a billing error), and what you'd like Nationwide Building Society to do. Keep a copy for your records.
- 2
Attach supporting documents
Include copies (not originals) of anything that supports your case — a receipt, a merchant email, a statement excerpt, or a prior response from Nationwide Building Society.
- 3
Address it to Nationwide Building Society
Address it exactly as shown above: Nationwide Building Society, The Complaints Team, NW 2020, Swindon SN38 1NW.
- 4
Send it with PostPal
Write or upload your letter to PostPal with the address above prefilled. We print it, add your return address, and mail it for you — no printer, envelope, stamps, or trip to the post office.
Common questions
What is Nationwide Building Society's address for a written dispute or complaint?
Nationwide Building Society, The Complaints Team, NW 2020, Swindon, SN38 1NW. Sending Nationwide a written complaint about an account, card, or service issue, per the address on its own complaints page. Confirm it on Nationwide Building Society's official site before anything time-sensitive — issuers do update these addresses.
Can I send a payment to this address?
No. This is a written-correspondence address for disputes and complaints, not a payment address. Nationwide Building Society's payment address is different and is usually printed on your own statement or card — mailing a payment here risks delay or misapplied funds.
What happens after I send my letter?
If Nationwide hasn't resolved your complaint within 8 weeks, or you're unhappy with its final response, you can refer it free of charge to the Financial Ombudsman Service.
What should I include in the letter?
Your full name, account number, a clear description of the issue (with the date and amount, if it's a transaction), and what outcome you're asking for. Copies of any supporting documents strengthen your case.
How do I mail this without a printer?
Write or upload your letter to PostPal with the address prefilled. We print it, add your return address, and mail it for you — no printer, stamps, or post office trip needed.
Sources
Addresses verified September 2026 against official sources. Always confirm on the official site before time-sensitive filings.