Dear Modip,
Now UAN no. is mandatory for PF withdrawl. Not accepted any withdrawl form by the EPF dept without UAN no., they will reject your form. So you must contact your employer / HR Deptt. to allot your UAN no. and mark it to on your withdrawl form then submit it.
Another thing now no needed to attest your forms and your documents with your employer. Your withdrawl form and documents will be self attested, and may be you may get problem to clear your dues for 10 C (pensiob fund) coz of as per earlier instructions released by Govt. Dept.