With 'Addon Coupons extra fields' easily extend function the coupon at the store.
Addon supports automatic generation of coupons that allows you to create coupons to all users.

Features:
Automatic generation of coupons:
Create coupon for all users
Generate coupons (number)
The length of the suffix coupon code
Coupon code must contain only numbers

Use coupon only for:
For product ID (separated by ,)
Except product ID (separated by ,)
For category ID (separated by ,)
Except category ID (separated by ,)
For Label ID
Except Label ID (separated by ,)
For Manufacturer ID
Except Manufacturer ID (separated by ,)
For Vendor ID
Except Vendor(ID separated by ,)
For User Group ID
Except User Group(ID separated by ,)
Once for each user
Not use product with old price
To currency(ID separated by ,)
For goods with characteristic(ID separated by ,)
For goods, the price range that (from,to)
The minimum number of items in the order (in the cart)
Minimum order amount
Limit on coupon usage (count)
Limit products (count)
Free Shipping
Free Payment
Use only for guests