As per act, once the company is taken over / merger it is nothing but a sister company. In such a case, if employee's are not to be allowed to withdraw their PF amount, but instead one has to insist employee's to apply for a PF transfer.
Irrespective of Old or New Company, they shouldn't sign the claim form, reason being employee is till working with a Parent company and if we are authorizing the said document, it would be a breach of Non Compliance & said person can be sued by PF dept.
Please take appropriate steps on the same.
I would rather suggest, apply for a PF transfer.