From Wiktionary, the free dictionary
Compound of kund (“customer”) + kort (“card”).
kundkort n
- Synonym of lojalitetskort (“loyalty card”).
2017 April 20, Erik Mörner, Mobil[1]:Nu lägger Samsung till även en rad kundkort som kan adderas i appen.- Now Samsung also adds a series of customer cards that can be added to the app.