Joining New Company Before Leaving The Old Company

I had given resignation from my old company and it was accepted with effect from 20 dec 2010 and gone on leave. but I joined the new company on 1 dec 2010 that is my date of leaving is later than date of joining in new company. I want to know if PF transfer is possible because the above dates has to be mentioned in form 13 for transfer ? ?
also is there any legal issue in this case when the date of joining in new comp is earlier than date of leaving from old cpmany ? ?

Greetings,
In case your new company is non-tolerant to dual employment, you do stand the risk to loose your job. Share a little more about what reason made you avoid taking a clearance from the old company. Incase the reason is humanitarian enough, you might still be considered. But that remains the prerogative of the HR and the leaders you report to.
In future, please avoid such situations. You end up risking not just a new job but a data which cannot be changed in your documents.
Regards,
(Cite Contribution)

The date of joining in new company could not be extended.
but what about the pf transfer ?