Dear friend, we all know vey well irrsponsible attitude of public servants. Sometimes they refuses to give aknowledgement signature to private couriers. So I suggest you not to give them a chance under this pretext and send the application by post office by regstered A/D or by speed post.
Arup ji has also suggested to sort out a hannel for complaint on net site of Election Commission.
"I have sent a form.... on.. for correction in my voter I/Card. I want to know that what action has been taken in regard to the said correcion form. Therefore, please give me certified/attested copies of all the notings made by the concerned officials and all the correspondence made in this regard.
Please send the informaton by registered post.
I am ready to pay all required charges as per provision in RTI Act 2005."
Keep a copy and money receipt for Rs.10/- carefully with you.