Hello, I use a prepaid monthly subscription for specific route to travel with my ov chipkaart. Now I got an offer from NS wintercity to upgrade my 2nd class ticket to 1st class seat for a day. I paid for it and received my eticket via email which has a barcode like anyother etickets from NS.
Do I checkin with this new eticket or just use my OV chipkaart?
Thanks for responding.