Frineds pls help me

Sindhuja (Final Student) (113 Points)

17 December 2013  

Prior to 2011, While accounting for Gift voucher sale, there happaned to be a problem.

On making sale:
GV Sale a/c Dr.

To Sales a/c

On redemption of Gift Voucher Coupons:
Party a/c Dr.
Sales a/c

As per the above entries, the income was accounted twice( first when sale is made, next at the time of redeeming GV again accouted as sales). The sale accounted was closed in the respective years, but the GV a/c, Which was grouped as Debtors, was still in our balance sheet. How to close this GV a/c in books???

Kindly help me out friends