Caskey is set to return to the starting 11 in place of Jeff Whitley, while Richardson is likely to feature as a sub as Billy Dearden aims to stick with most of the side that impressed at Brentford.
Liburd is still feeling the effects of a knee injury picked up at Plymouth over the Christmas period, and is unlikely to feature.
Notts will also be without Marcel Cas, Paul Bolland, Tony Hackworth and Stuart Garden, all due to injury.
However, Bolland and Liburd are not expected to be out for much longer.