The phrase 'have to note' is correct and usable in written English.
You can use this phrase to express the need to take notice of something or to pay attention to or observe something. Example sentence: "We have to note any suspicious behavior in the area."
Agents should have to note why they initially seized and questioned any person, the study said.
He didn't have to note that his father is the truculent singer-songwriter Steve Earle.
"I don't know if it is something my father installed in me, but I have to note it down.
Airlines will also have to note the cancellation rate for any flight canceled more than 5 percent of the time.
"But you have to note that the elected officials in this county are extremely reflective of the population of the borough.
Those prospectuses would need to be cleared by the S.E.C. and would have to note prominently the company's lack of revenues.
Since most G.O.P. presidential candidates endorse all this, one would have to note that today's Republicans lend new meaning to the phrase "war profiteering".
When chronicling Temple's success, one does have to note that her father is Julien Temple, renowned chronicler of British punk and pop, from The Great Rock'n'Roll Swindle and Absolute Beginners to recent documentaries on Joe Strummer, Dr Feelgood and Glastonbury.
We have to note that obtaining open-source intelligence in America has become more difficult, because traditional news shows have become more comedic and more comedic news shows more authoritative.
"I have to say, I think we have to note tragedies of this magnitude," the Senate Democratic leader, Tom Daschle of South Dakota, told reporters on Tuesday, referring to Sunday's attack.
