The phrase "acknowledged back in" is correct and usable in written English.
It can be used to refer to a past event or recognition that occurred at a specific time.
Example: "The findings were acknowledged back in 2015 during the annual conference."
Alternatives: "recognized in" or "noted back in".
Zuckerberg acknowledged back in September interviews that this was an issue: "What [people] really want is the ability to express empathy.
The company had already acknowledged back in January that it had new, more robust parental control features in the works, following an open letter posted by two large Apple shareholder groups, Jana Partners LLC and the California State Teachers Retirement Systemm.
He said things had since changed at the 81% state-owned bank: "We acknowledged back in February that there were serious shortcomings in our systems and controls on this issue, but also in the integrity of a very small number of our employees.
It was a truth universally acknowledged back then that a single man in possession of a good fortune must be in want of a wife.
In an interview with Fox Radio on Thursday, Romney laughed as he said that he didn't remember the incident, although he acknowledged that "back in high school, you know, I, I did some dumb things.
Activision is now one of the most maligned publishers in the industry; the publisher's own CEO acknowledged this back in 2008 and not much has changed.
By this time the FBI had acknowledged that back in 2011 the FSB had alerted it to Tamerlan's existence, as part of a regular exchange of information on suspected terrorists.
While Kerry's campaign acknowledges pulling back in Arizona, Arkansas, Louisiana and Missouri, which are trending for Bush, they say that the ticket has bounced back in West Virginia and that Ohio and Florida remain competitive.
Even cynics acknowledge that, back in Argentina, then-Archbishop Jorge Mario Bergoglio was known for a populist touch, humble living and plain speaking, a product of his Jesuit background.
Buonocore acknowledges that back in 2011 they had a limited understanding of the true scope of climate change caused by coal and that they used a key factor --the EPA'Socialal Cost of Carbon which turned out to be painfully low.
Barclays and Raymond James have also acknowledged scaling back operations in Brazil.
