Noobish question: Are you supposed to respond to realtime updates (RTUs) somehow? Keep getting RTUs on the same dispute which FB has already refunded. So, should one echo something in the RTU callback? Just been through all the documentation I can find (again) and can't seem to find anything on response.
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):
问题:
回答1:
Yes, you need to return a 200. The content type or response body do not matter. Anything else results in Facebook retrying the callback until a 200 is received, so you'll get lots of spam
