FANS attending either of the two NAB Challenge games at Etihad Stadium on Saturday will be allowed free access to the other match under a two-for-one offer announced by the AFL.

Richmond and North Melbourne will kick off the double-header at 1.10pm AEDT before the Western Bulldogs take on Collingwood, with the second game starting at 7.10pm.

The League announced on Monday that members or ticket holders attending one of the games are eligible to receive free access to the other.

AFL and club members will be able to access the offer by scanning their membership card into the venue for both games, while fans with a daily ticket to either game will need to present it (along with proof of purchase) to ticket booths at the ground to receive the free pass.

After playing games across regional venues in the first two rounds of the NAB Challenge, clubs will return to major facilities and ground for the final round, which begins on Thursday at Etihad Stadium when St Kilda faces Hawthorn.

The AFL scheduled a number of local derbies for the games to limit each club's travel load ahead of the home and away season, which begins on Thursday, April 2.