If Arbuthnot Latham Log In is failing, first make sure you are using the right digital service. Arbuthnot Latham separates online banking, the mobile banking app, and the cards app. The mobile banking app is for account access on your phone, while the cards app is mainly for card controls and card-transaction checks.
That distinction matters because many login problems come from opening the wrong app, expecting card tools to behave like full banking, or trying to register mobile banking before online banking is set up.
How to Log In
Online banking and mobile banking
- Start with Arbuthnot Latham online banking if you need balances, payments, statements, or secure messages.
- If you want phone access, register for online banking first because the bank says you must already be registered and have logged on before using the mobile banking app.
- Enter your online-banking Logon ID and the password you created.
- Complete any required security step, including the SMS security code used during mobile-app registration.
- If the mobile app was already registered on another device, stop guessing and call support before you lock yourself out.
The bank says the mobile banking app can only be registered to one device at a time.
If your problem is really about cards
- Use the separate Arbuthnot Latham cards app if you need to activate a card, place a temporary block, retrieve a PIN, or review card transactions.
- If an online card payment is being challenged, the bank says it may ask you to verify with an SMS one-time passcode, the cards app, or a Digipass.
- If you changed your mobile number and card checks stop working, contact Card Services before retrying more payments.
- If your card is lost, stolen, or you suspect fraud, call the 24-hour Card Services line immediately.
- Do not treat the cards app as a full replacement for online banking when you need account-level access.
No verified USSD login path was found for Arbuthnot Latham from this environment.
Known Issues & Common Problems
- You are trying to use the cards app when you actually need full online or mobile banking.
- You are trying to register the mobile banking app before online banking has been activated.
- Your mobile banking app was already registered to another device, so the setup does not complete cleanly.
- Your online-banking issue is really a payment-authentication problem tied to SMS OTP, the cards app, or a Digipass.
- You need card-fraud help or a lost-card block, not normal banking support.
The bank’s own digital-services pages make the separation clear: online banking handles account access, the mobile banking app depends on prior online-banking registration, and the cards app is focused on card controls. Once you identify which service is failing, the recovery path gets much easier.
Customer Complaints & Common Problems
This section matters because Arbuthnot Latham publishes a real complaint process with real timings. Its current complaint procedure says it will “always aim to resolve your complaint within three business days from receipt” and, if it cannot do that, it will send a written acknowledgement [Arbuthnot Latham Complaint Handling Procedure, accessed March 8, 2026].
- If your relationship manager or normal support path is not fixing the login or payment issue, move the case into the formal complaint route instead of restarting the same call.
- If the complaint is about payment services, the bank says it aims to resolve it within 15 business days.
- If the bank still has not issued a final response after eight weeks, or after 35 business days for a payment complaint, the procedure says you may refer the matter to the Financial Ombudsman Service.
The public complaints page names the Chief Compliance Officer as the complaint contact, with phone +44 (0)20 7012 2500 and email [email protected]. The procedure also says you can complain in writing, by email, by telephone, by secure message, or in person.
Troubleshooting Tips
- Work out whether you need online banking, the mobile banking app, or only the cards app before you try again.
- If mobile banking will not register, check whether you have already completed online-banking setup first.
- If a payment check fails, note whether the bank asked for SMS OTP, cards-app approval, or a Digipass code.
- Use secure message from inside online banking if you can still sign in but need help with a specific issue.
- If the matter is urgent or fraud-related, call instead of waiting for a routine digital reply.
Security Tips
- Never share a one-time passcode or PIN. The bank says it will never ask you to disclose one by phone.
- If your mobile number changes, update it with the bank before relying on SMS security checks.
- If a card payment challenge feels suspicious, stop and call Card Services rather than approving it blindly.
- Use the 24-hour card line immediately for lost or stolen cards or suspected fraudulent activity.
- After access is restored, review recent transactions and secure messages before continuing as normal.
Contact Customer Service
- Private Banking Support: +44 (0)20 7012 2600
- Commercial Banking Support: +44 (0)20 7012 2100
- Card Services Team, including lost or stolen cards and suspected fraud: +44 (0)20 7012 2900 available 24 hours
- General complaints contact: +44 (0)20 7012 2500
- Private Banking Support email: [email protected]
- Commercial Banking Support email: [email protected]
- Complaints email: [email protected]
The current contact page says Client Support is available from 8:00 to 18:00 Monday to Friday and 9:00 to 13:00 on Saturday. Secure messages from online banking are actioned within two business days, but the bank says to call if the matter is urgent.
Related Bank Guides
Frequently Asked Questions
Do I need online banking before I can use the mobile banking app?
Yes. Arbuthnot Latham says you must first be registered for online banking and have logged on before you can use the mobile banking app.
Can the mobile banking app be registered on more than one device at a time?
No. The bank says the mobile banking app can only be registered to one device at a time.
What number should I call for lost cards or suspected card fraud?
The bank’s current 24-hour Card Services number is +44 (0)20 7012 2900.
How quickly does Arbuthnot Latham aim to resolve a complaint?
The complaint procedure says the bank will always aim to resolve a complaint within three business days from receipt.
Last Updated on March 8, 2026
URL: https://log-in.me/arbuthnotlatham-london-unitedkingdom/