No, this is not possible. Since Parkster issues live tickets only, parking sessions cannot be started or booked afterwards.

If you see a sign on-site stating that payment is possible within 24 hours, this rule is provided directly by the parking operator (e.g., the city, municipality, or a private operator) and does not apply to Parkster.

What can I do?

To avoid a potential parking fine, please contact the respective operator directly as quickly as possible. You can find contact details for private operators on the signage at the parking lot; for public spaces, the local city or municipality is your point of contact.