If employee is opting for withdrawal of PF he has to declare in PF forms for being unemployed for 2 months.
If employee is opting for transfer of PF employee can submit forms thru new employer.
Company has to submit PF withdrawal forms to PF office in 5 days and has to supply acknowledgment issued by PF office to employee.
If you have the acknowledgment and POD of submission of PF forms to previous employer you may submit a written representation under acknowledgment addressed to good offices of your appointing authority, MD, with a copy to Head-HR and mention the details of POD and demand the original acknowledgment issued by PF office be supplied to you by redg. post only and you may highlight that postage prepaid {as purchased from PO} self addressed envelope was supplied/is enclosed for sending redg. post to you. You may mention CC to RPFC of the concerned PF office.
Companies do resort to tactics and are known to claim that reply/acknowledgment was sent by ordinary post.
If the employer resorts to false replies etc you can submit fresh PF forms duly attested by designated officials e.g. BM of the bank where you have an a/c, direct to PF office with copy of your letter to good offices of your company and write that company has not been attesting and submitting your PF forms and a complaint be lodged and action be taken against company. You can chase the complaint thru RTI.