Return Merchant!!!

Hi,

I'm getting this message when I try to use paypal as payment "This invoice has already been paid. For more information, please contact the merchant." why? it doesn't allow me to go any further to complete the transaction!!please help

Thanks

Sam

Hi,

Please look at that page of the documentation:
www.hikashop.com/support/documentation/3...l-error.html#already

Thanks Nicolas