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Kiwibank is being urged to tighten security at the New Zealand Post outlets it operates after a string of robberies.
The calls come after a man police call the "yellow robber" this week struck the same Post Shop in South Auckland he targeted two weeks ago.
Another man, also suspected of robbing Post Shops, was arrested in Auckland on Monday after being recognised by police in a fastfood restaurant.
Union representatives said it was time for Kiwibank to reassess security systems at Post Shops.
"For many people it's enough to put them off a job," EPMU secretary Andrew Little told Radio New Zealand.
Andrew Cassidy, general secretary of financial services union Finsec, said some banks had set up extensive closed circuit television cameras and others used double door entry systems to improve security.
But Kiwibank spokesman Bruce Thompson said Post Shops had good security.
- NZPA
