When making cash payments using Naver Pay or Kakao Pay including real time account transfer on the Jinair website, issuance is available once you input the issuance information in the payment window.
In the case you did not apply for the issuance of the cash receipt, please inquire for details to the simple payment company(cash receipt issuance agent)
Since each simple payment company voluntarily issues cash receipt, after checking the voluntary issuance approval number through the simple payment company you paid for, you can register as a consumer for the voluntary issuance on the website of the National Tax Service.
However, for tickets purchased through a ticket agency, please inquire to the ticket agency you purchased your ticket at.