On BTST related

Hi I am very new here in trading field…
I have a query on BTST like most of my frnds told me that if u buy stock or sell before it come to ur holding then it can cause penalties…
What if I buy share of reliance Bajaj MRF Eicher motors sreecement or some others with high volumes then still do I need to be wrry on penalties or it’s okay with these stocks

Risk of Short Delivery will be less in high volume stocks but it’ll still be there but much lesser compared to low liquidity stocks.