After changing their business name over a YEAR previous, including all external business listings from Bing to Yelp, and doing a search & replace in their WP database, Google was still appending the old name in their SERP titles.
For new company name searches, the knowledge panel was correct, other listings in the SERPs were correct, but the "rewritten by Google" home page title was not.
It got so bad they just removed the real name from the titles because Google still added the second. Made no sense.
Fast forward 6 months to now, they had a new site built - I personally searched the database for any legit references to the old biz name, and found none. I was sure that once it was cached the issue would go away, but it didn`t.
My dumb SEO question is... Is there still no way to get Google to stop appending the F-ing title tags?
and on a more specific level, if anyone has suggestions for this situation, i`m running out of ideas...