hello and thank you!
no, I haven't configured any shipping in paypal profile.
anyway, my problem is not that it charges the shipping. in fact it doesn't charge anything, as shipping is set to 0 in your plugin admin. so that's fine for me.
but paypal sent an email an told me I have to set the products to be "services" instead of "physical products", because otherwise they will treat the payment as needing shipping and they hold the payment waiting for a sort of shipping code.
which hidden field can I add in order to tell paypal that the product is a service and not a physical product?
thanks!