Actly, there is a recent amendment in this, I am not sure whether it is an amendment in the Act or just an amendment in the rules, but it is surely there.
As you know that your PF Shares goes into two accounts, EPF A/c (Employees Provident fund) and FPF A/c (Family pension fund).
If you leave ur job within 6 months, you will only get the amount in your EPF account, but NOT the amount in FPF account; ie you can fill only form No. 19.
Whereas if you leave ur job after 6 months you will get both the shares of your PF account, ie you can fill in Form 19 as well as Form 10C, or 10D whatever applicable.
I don't know why this wierd order has been passed but it is defenitly there and it is a recent amendment..
Cheers.
Kapil..