The 25-year-old from Auckland Blues arrived in the province last week and was given a clean bill of health to start his first RaboBank Pro12 League clash.
However, the necessary documentation regarding his registration has yet to drop through the letterbox of the appropriate authorities and Payne may have to sit out the game against the Pro12 League leaders. Payne is due to start at the expense of Adam D’Arcy, who will revert to the bench, while a fit again Declan Fitzpatrick is set to replace Paddy McAllister at loose-head.
Meanwhile, Munster coach Tony McGahan is relishing the arrival of another southern hemisphere star, Will Chambers, who joins the province from Queensland Reds.
Chambers played in the NRL Grand final for Melbourne Storm in 2009 before turning his attentions to union.
Meanwhile Connacht Rugby have re-signed second row Dave Gannon.