Celtic have accepted Rangers' offer of 700 tickets for the Old Firm derby at Ibrox next month.
The clubs meet in the Scottish Premiership on April 3 and the Gers are allowing the return of Hoops supporters.
The Parkhead club say briefs are now available for eligible season ticket holders.
Those offered a ticket for the match in March 2020, which was cancelled due to Covid, can now purchase them.
Celtic's official tickets account said on Twitter: "Tickets for away match v. Rangers are now on sale to eligible STH (season ticket holders).
"Tickets have been allocated to those STH who were originally offered tickets for the match v. Rangers on 15th March 2020 which was cancelled."