The media union is calling on TVNZ to come to the table to discuss proposed widespread cuts.
The state broadcaster has announced proposed cancellations of Midday, Tonight, Fair Go and Sunday, with up to 68 jobs affected.
Union E tū has raised concern on behalf its members about the changes and process.
Negotiation Specialist Michael Wood says it's dangerous for the national media platform to dictate a top-down approach.
"We're wanting TVNZ to halt its current proposals, which will gut news and current affairs from our public broadcaster- and come sit down with its staff to talk about the future of the company."
TVNZ says it'll respond to the letter in due course.
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