Balasubramaniya Kumar, 74, had been placed in the container after his brother assumed he was dying, at their home in Kandhampatti, India.
But when a worker for the freezer box firm came back to collect it, he noticed Mr Kumar shivering and his hands trembling, reports the New Indian Express.
Bizarre video even shows the elderly man gasping for breath inside the box.
Cops said that he had recently been discharged from a hospital in a critical condition.
But, his younger brother Saravanan had arranged for a freezer box to be delivered to his home, as he allegedly waited for his poorly sibling to be read the last rites.
Suramangalam police rescued Mr Kumar, and the elderly man remains in a critical condition at Salem General Hospital.
Cops told reporters that Mr Kumar’s brother “has a mental health condition” and had, obviously, incorrectly assumed his brother was about to die, so put him in the freezer box.
A police officer told NDTV: “A case of negligent conduct and endangering life has been registered. We are investigating”.
No arrests have been made.