Dear Jani, the same is not correct as per PF rules; once a member, always a member, even if their salary increases from ₹6,500 to ₹15,000/-. Their contribution is payable on ₹6,500/-. However, once the member withdraws the PF amount and settles their account with the PF department, they will cease to be a member of the PF Fund. The example given by you may cause a problem for the employer; the contribution is liable to be paid in respect of such a member and cannot be discontinued.
You can do one thing: ask the member for resignation and withdraw their PF amount. Then, upon a fresh appointment with a salary more than ₹6,500/-, have the member fill out Form 11, stating, "I am not a member of PF amount." However, it amounts to unfair labor practice as you deprive them of benefits pertaining to continuity of service. I hope this satisfies your query.
Regards,
Janki Jani