Need help

I'm a fresher with TCS offer however they haven't given the joining letter yet. I'm planning to join another company in the meantime. I hope the company is good and if things go south, I'm planning to leave it and join TCS when they give the JL. The doubt is, will there be any issues if the company has issued an entry in PF? What if they did make an entry and while planning to leave the company, I get the relieving letter and migrate the PF to TCS before joining?