Trending @Accenture; Can we do work for 2 company at same time

Hi,

I want to resign but my notice period is of 90 days but I need to join other organisations( government) within 30 days here I do work from home and generally work is also not so hard I mean I can manage both things for some days how other organization know I am currently working for other as well also I don't mention them I have some experience will it work for me or not is by pf they can check my employee history or what hr people pls reply