Dear,
When a person joins a new organization, the HR department of that organization takes Form 11 from each employee, which states that the employee was not a member of the PF in the previous organization. Legally, if you have not withdrawn the PF from your previous employment, then you should be a member of the PF in the future organization as well. However, generally, new organizations take Form 11 from employees and do not enroll them if their basic salary is more than 6500.
Thank you,
J. S. Malik