We are using private API and get a message: http://prntscr.com/uvz05z
but the issue is that we do not use create_product webhook at all
we use a private app and this issue happens only in our store, please advise
Based on what you provided in the screenshot, it looks like you have an app installed on that shop that has webhook subscriptions for that products/create topic. Looking at the host provided in that email, you can look to see if you have an app from fulfillman.com installed.