disable vouchers for items on sale
First avalable module that allows to disable vouchers if cart contains items with dropped price.
This feature is no longer available in PrestaShop 1.5.x and 1.6.x
because of this i decided to develop module that will automatically disable possibility to use voucher codes for items that are currently on sale (on sale - it means that product has discount, new lowered price)
with this PrestaShop module that i offer here - shop will block possibility to use of voucher code if cart will contain items that are on sale. You can see an example on the screenshot above.
more informations about module you can find here:
disable vouchers for products with dropped prices