Preventing Scams with the Phone Menu
Stable NPS
30% fewer scams in test
Phone menus (‘IVRs’) are usually to be endured, not embraced . But evidence shows messages can change behaviour. This project successfully targeted 'Safe Account Scams' - those convinced by a scammer to move their money elsewhere.
Great impact - effort ratio
Small shifts in behaviour at scale for minimal cost and time - every customer asked to call is exposed
High flexibility
Rapid shift in messaging and flows possible using modern Cloud-based infrastructure
Wendy | Channel Strategy Manager| Santander
The Challenge
The Future
View more on Stopping Scams with AI
Outcomes
30% fewer safe account scams on test line
Stable NPS, No Complaints
Methods used
How Pete combined Behaviour Science and Design to stop scams.
Discovery Activity
Data and Insight
Behaviour modelling with 'COM - B'
Observation and Simulation
Scams Psychology Research
"Data analysis pulled together customer feedback from surveys, intents and routing.
Simulation and experimentation helped model customer motivation and behaviour in the IVR. What was the mindset of our target audience, how did that change through the call?
All this set up Design and experimentation.
Design Activity
Design Thinking : Ideation
Behaviour Design
System Design
Scams Psychology Research
"Armed with insight into Customer mindset I came up with some levers to pull, and a number of wording and flow designs. These got played with and re-shaped with the IVR team considering system capability.
Our goal was to deploy designs at pace within the existing IVR infrastructure and change methodology.
Prototyping and Testing
Lofi Prototyping
Hifi Prototyping
Test Design
"IVRs provide brilliant opportunities for testing different ideas.
Fantastic collaboration with the IVR team and Tech meant we could go from concept to live in a week. Multiple lines, with recently improved MI to measure impact. This matters : we needed to measure live behaviour to show any impact .
Versions were tested over a 4 week period, to allow for the relatively low volume of scams in our target pot.
Delivery
Jobs to be Done
Story Mapping
Continuous Discovery
"Cloud infrastructure and more great collaboration meant going from experiments to fully deployed messages in a few weeks.
Flexibility to iterate when live was so important. Anything aimed at customers rapidly becomes noise. What worked today might not tmrw.
IVR works best as a live Product, with continuous agile discovery built in to iterate on a regular basis. Short cycles of discovery, design, testing and delivery made all the difference in this activity.
View more Case Studies
See how others Protected their Customers with Behaviour Science and Service Design
Contact
Roll & Flow : Prevent
Stop scams with Science wired into every step
© 2025 Tamashii Design Ltd. All rights reserved. Roll & Flow and Roll & Flow : Prevent are trading names of Tamashii Design Ltd, registered in England and Wales (No. 16294814).









