Recently, the Supreme Court ruled that casual employees with temporary status who have been working for a long time can qualify for a pension after they retire even if the government never officially made their employment permanent.
This judgement came from a case filed by temporary status workers at a post office in Bihar. They received benefits similar to other Group D employees, but not through any formal notification, which meant that when they retired, they didn't receive any pension benefits, nor did their families get a family pension.