How to complain about Santander UK
Santander UK complaint routes for accounts, loans, cards, mortgages and arrears handling.
Santander publishes complaint routes by phone, digital banking, branch and post. Include your account details, what happened, when it happened, how it affected you and the outcome you want.
Keep the complaint reference
Santander says it provides a complaint reference number. Keep that reference with copies of correspondence and notes of calls so the chronology is clear.
Escalation after the final response
Santander explains the Financial Ombudsman route for eligible complaints that remain unresolved. The final response should explain the applicable referral rights and deadline.