Supercars organisers have sent a message to fans heading along to next week's Newcastle 500.
Strong ticket sales mean the concert site has reached peak capacity.
Anyone planning to attend the Delta Goodrem/The Veronicas concert on Friday night and the Cold Chisel concert on Saturday night, will need to collect a wristband from one of the four information booths located throughout the event precinct.
Fans will need to present their physical ticket at the information booth to receive their wrist band.
"Having a ticket does not guarantee concert access, so we ask that you arrive early to collect your wristband from the information booths. Wristbands can only be collected on the day for that night's performance," Supercars organisers said in a statement.
Only holders of Saturday tickets purchased before November 10, 2017 will be eligible to collect a Saturday Concert Zone wristband.