Hundreds of cancer patients are being placed on the Job Seeker Hardship, making it harder to gain financial support for their treatment, in what the Cancer Society says is "ludicrous".
The move came after the sickness benefit was replaced by the Job Seeker Hardship in 2013.
A cancer patient who did not want to be identified told Radio New Zealand she had to pay for a medical certificate every month to prove she was not fit to work. Her surgeon told her she wouldn't be able to work for much longer.
"The letter from the hospital wasn't sufficient. I then had to go back and get a doctor's note to keep them happy, just to prove the fact that I was going in for surgery," she told the national broadcaster.
"Then I also had to, on the day of my surgery, get someone from the hospital to fax through that I had been operated on," she said.