"I am the only business in New Zealand that doesn't have a QR code," Rupa said in the video.
A second video posted to YouTube shows Rupa telling a crowd at Auckland's Aotea Square to support businesses that do not have a QR code.
"So no QR codes for me," he said.
He told those in the crowd to tell every business they go to, to "take the QR code down" as it's "unlawful".
In the YouTube videos, Rupa defends his stance, mentioning he had a sign-in book and other sign-in options.
It is a legal requirement to display a QR code at all businesses and workplaces at alert level 1 and higher.
WorkSafe said all New Zealanders have their own part to play in the management of Covid-19.
The case is now before the courts.