Hi, I live in Spain and often have to put my P&P in as "Courier" and detail the costs and that it will be coming Spanish post.
I have never had an issue with invoicing before but suddenly this week I am getting the option of putting P&P in (next to "Postage and Packaging via") but then when I try to send the invoice it tells me "Invalid Postage Method" but won´t let me change anything. HELP!