I don't post these to slam the authenticators, I do it so hopefully they'll see this type of forgery and recognize it in the future. Unfort any time I've contacted them thru other means - they've ignored me. A one off sig can throw even the best authenticators off - but when you see more of them you notice the same errors repeatedly.
https://www.ebay.com/itm/MICHAEL-JACKSON-Signed-THRILLER-8-X-10-PHO...
Here are more of this same style.

I have folders and folders of his forgeries, he signs a few different ways


This style forgery was being sold by a guy named Richard LaMotte - a pilot who claimed he got these items signed while on private flights with MJ.