Fraud-proofing UX: The 2FA solution

I led the design of 2FA (Factor authentication) for Nandos to tackle the issue of fraud, mainly account takeover fraud (ATO). This led us to introduce 2FA and the challenge became encouraging customers to enrol a 2nd factor.


This feature was shipped to 300k+ Nandos customers across all platforms.

Role

Lead Product Designer

Duration

6 Months

Team

Jane Doe

Product manager

John Doe

Software engineer

Jane Doe

QA engineer

John doe

Technical Lead

1

Case study still in construction

Context

Nando's is a South African multinational chain of fast casual dining restaurants, famous for its Portuguese-African style peri-peri flavored chicken. Nandos now offers a platform for users to order their spicy peri-peri and get rewards for it.

Problem

As of March 2022, Nando’s has seen a sharp increase in the levels of online ordering refunds compared with previous months. This is attributed mainly to an increase in fraudulent behaviour around delivery order refunds, specifically with two main types of refunds (both trigger full refunds): Order Marked Delivered but Not Received (OMDNR) - An order is marked as delivered by the Deliveroo rider but the customer claims they never received the orderSpilt/Damaged orders - A customer claims that the items in the order have been damaged in transit.

Scale of fraud: In January 2022, Nando’s was refunding (across the two refund types mentioned above) approximately 100 orders per day with a total cost of around £3000.At its peak towards the end of March, before action was taken, Nando’s was refunding approximately 365 orders per day at a total cost of £16K per day. Measures enacted at the end of March have stabilised this rate at around 300 orders costing approx. £10.5K per day. Account take over fraud could result in a fine of up to £17million (20m Euro) or 4% of global turnover Fraud at Nando's The growth of our digital channels has also expanded the domain for online fraud.

Malicious actors have more opportunities to commit fraud or take over accounts, meanwhile, our customers expect an easier digital experience, including fast authentication and seamless web and mobile interactivity. To build and maintain brand love and trust, we must strike a balance between delivering seamless multichannel digital experiences, whilst maintaining strong security standards. Optimising our digital channels to meet regulatory demands, fulfill consumer expectations, and ensure resilience against attacks, making cross-functional decisions when designing the secure journey.

Hypotheses

Customers prefer to login with an authentication method that is familiar and do not believe high levels of security to be necessary.

Success Metrics

Reduce the amount of takeover fraud and protect customer security and data.

1

Reducing ATO fraud

Encourage customers to enroll into a 2nd factor for improved security

2

Increase 2FA for both SMS and Email customers

Solution

Introducing 2FA authentication has tackled the fraud issue and enabled CRM to get more clean data from customers. Reducing ATO and improving security while we've introduced others aspect to encourage customers to enroll a second factor from email campaigns to small nudges on the app.

Challenges and considerations

Since we're leveraging Okta, there were quite a few challenges and considerations we needed to have in place before deploying 2FA ranging from technical limitations to experience of existing users.

All new accounts created after Tue 17th we'll be asked to enrol to SMS 2FA (mandatory)

1

New customers

All existing accounts (registered before SMS release in May) will have a verified email

1

existing accounts

Will be able to identify the authentication status of our customers at an individual level

1

Auth API

All new accounts created after Tue 17th we'll be asked to enrol to SMS 2FA (mandatory)

2

CRM data

"It's not a bank, why do I need 2FA?" We know that customers do not want to verify for more than one MFA method in one hit

2

Customer expectations

All customers need to enter a phone number before placing an online order. This phone number is used for delivery purposes

2

Online ordering

Ideation

Ideated with the team to come up with some ideas on HWM encourage customers to verify for a 2nd 2FA Method and looked at all the possible outcomes.

Significance

We know that its important to verify customer data, so that we have quality CRM data and so customers receive order confirmations and updates.