Earlier quoted context omitted.
In my country (India), quitting is a nightmare, especially in the IT consultancies. We have to serve a 3 months notice period. HRs and managers will threaten you (had multiple personal experiences). Then if you somehow quit, you are still at the mercy of previous manager and HR for service (experience) letter, which is needed for future jobs. If you are on H1B, quitting can be even more challenging. Some companies th…
I'm in Australia. Notice to serve is 2-4 weeks, some get 'stress' sick leave for the period, but most don't. Threatening you how? In AU its criminal, nobody does that. No letter is required here for the job, but references are. Just names and phone numbers of mates you worked with, checks are done on personal level, not through HR.
Second time happened when I was in US. They were forcing me to go back to India, and I found another job. Went in to quit and the manager indirectly told me that I may face issues with my service letter. I ended up not quitting because of all the stress and uncertainties.
We need this service letter for finding new jobs in India, and may also be needed if applying for green card.