SumUp
Product ManagerComplexAug 6, 2026

Safeguard affected reader payments through certificate transition

A mandatory technical change can turn a reliable device into a merchant continuity problem.

Teams often weigh broad protection, limited replacement capacity, and commitments that cannot be easily reversed.

I can’t turn up on Saturday and find out the thing I use for every sale won’t work.

Gamze Zayed · Owner of a market-stall bakery

She uses an older reader as her primary way to take card payments at weekend markets.

What pulls against what

  • network deadline vs. merchant continuity
  • standardized retirement vs. targeted protection
  • subsidy exposure vs. payment-volume preservation
  • automated impact lists vs. verified outreach

What is at stake

A fixed external deadline threatens payment continuity for merchants on older devices. The chosen path affects who keeps trading, what can be certified, and what cannot be undone

Why SumUp

At SumUp, payment continuity can matter most for merchants least able to absorb a sudden device change.

Written for

Reliability Product ManagerPayments Product ManagerRisk-aware Product Manager

This is the setup. The work is inside.

Running it puts you in the room: the full situation and its constraints, stakeholders who push back in their own words, and the decisions that are yours to make. What you produce becomes a Day One Plan — work you can show someone instead of describing.