Her father-in-law died on June 30, the day before the carbon tax was introduced, and was buried early last week.
"I thought to myself, 'What carbon could possibly be used by putting a man in a grave?'" Ms Maliki said.
"All they did was put the dirt back in. How can they charge us a carbon tax for burying someone?"
Ms Maliki's son Zaid said the cemetery's receptionist told his sister-in-law "even the dead don't escape the carbon tax".
"We are pretty upset… that comment was a kick in the guts," he said.
The cemetery's communications manager Rebecca Atkins said if the comment about the carbon tax was made, it was in error.