If you take admission in a Government BHMS college then you have to sign a indemnity bond which will say that if you leave the course midway (for not so critical circumstances) then will have to pay some amount of money (amount will be mentioned in the Bond) after that only you will get the certificates and can join the MBBS course.

For more information regarding NEET consider the link below:

https://medicine.careers360.com/exams/neet

I hope this helps. Wish you a great eve!