How can I claim Club Eurostar points for a past journey?
You can collect points for any eligible journeys you have travelled on in the last 90 days. As soon as you've travelled, you will be able to these bookings to your account. If you’ve made any journeys in the 90 days before joining Club Eurostar, you can claim points for these as well.
Log in to your account at eurostar.com and go to claim missing points.