Trending @Capgemini; 12 days in a month BTO is it mandatory?

Anyone got fired or termination due to avoiding this policy??

If you're on the bench, do not take the risk.
Ideally the rule is to be in the office for 60% of the working days in a month (excluding the leaves, public holidays and weekends). That number usually comes to 11.5 to 12.5 if you've taken no leaves.
But the minimum requirement is 12 days froYm office to avoid any problems.