12306 will there be a system notification after the tickets bought are returned with paper tickets?

After you have successfully purchased tickets and obtained paper tickets, if you have refund business, you must go to the ticket window of the railway station with your ticket and second-generation ID card to handle the refund business manually. This refund will be directly returned to the bank card you paid for the ticket. The specific time of receipt depends on the regulations of the bank where you use the bank card, generally within 0-20 days.

Good luck!