Unite Union is urging all hospitality workers who come across aggressive anti-vaxxers to call the police.
Unite Union national secretary John Crocker said in a statement no employee should be forced to check for vaccine passes if they don't feel safe.
"There is a very real risk both of further physical and verbal aggression and, of course, of exposure to COVID."
Crocker is worried anti-vaccine groups will just push through at a venue and will get served.
"It will only take hours for word to get around the anti-vax groups that just pushing through at that place will get you served without showing a vaccine pass."
He is encouraging any staff that this happens to, to call the police.
"If that happens we advise workers to simply withdraw to a safe distance or place and call the police or whatever other professional security is available."
Crocker says if employers find that too disruptive then they need to invest in security crews rather than put staff at risk.
Crocker told Newshub the reason the Union are encouraging staff to call police is because of the heightened aggression New Zealand has seen from the group over the past year.
"There is a concern if you pay attention to what they are saying on social media, is that people take this opportunity to have a go at businesses and make it really difficult for workers."
Crocker said the union believes there is a heightened risk of aggression while Aotearoa is in the transition period between the alert level system and the traffic light framework. He hoped the Government would have given support to the likes of the hospitality sector to ensure staff are kept safe.
"It's disappointing that support hasn't come in advance, Worksafe could be doing a lot more and focusing on hospitality right now and over the next couple of weeks."
Crocker has one message for the anit-vax groups.
"Keep your comments to the chat, the workers aren't your enemy, they are just there trying to do their job to make a living a keep everyone safe."
