Hello Aspirant,

If you were not allotted a seat in the mop-up round , then you will get your security deposit back to the same account from which the payment was made but it may take time.However, your money won't be lost.If you want to try for stray vacancy round, you may register in the website of the college you wish to try for.The refund will take place only after the entire counselling process is over, they will release a list of candidates who are eligible for fee refund, so you should keep checking their official website for timely updates.

https://news.careers360.com/neet-2020-stray-round-eligible-candidates-list-released-at-mccnicin

All the best