Chiefs midfielder Alex Nankivell has been barred from entering South Africa for his side's Super Rugby quarter-final against the Stormers.
Nankivell was a possible starter at second-five for the Chiefs on Sunday morning, but an issue with his passport meant he could not enter Johannesburg when the Chiefs arrived earlier this week.
Chiefs coach Dave Rennie put the issue down to a clerical error when the passports were sorted in Wellington.
"All the passports are administered in Wellington, they had to be physically taken down there, and all our visas are valid until 31/8/2017, for some reason Alex's.... expired at the end of June."
The Chiefs hadn't played in South Africa since April, meaning the issue was only discovered when he landed in Johannesburg.