These ‘FAQs for publishers’ are intended to assist publishers in processing APC payments for Gold Open Access on behalf of authors and their institutions. We hope they will provide answers to commonly recurring questions, explain issues and promote understanding between all parties involved in APC payments.
The FAQs are an output of our Jisc Good Practice Pathfinder project, any feedback, comments or issues please tell us! We’ll update the FAQs if appropriate.
OA Good Practice Pathfinder Project - Bath 
Excellent! Also, “don’t levy page and colour charges”.