In the new year, the PAN number has become mandatory for new things. To prevent transparency in transactions and prevent tax evasion, the government is using pan card as a weapon.
Zee News Desk Zee News Desk | Updated: Jan 10, 2018, 08:00 AM IST

Due to the new rules, now you have to keep the pan details together.
Source
http://zeenews.india.com/hindi/business/10-things-you-wont-be-able-to-do-without-your-pan-card/363905