Notice/Prejudice Rule for Insurance

Does Oklahoma require that before an insurer may deny a claim as untimely, it must first prove that it was prejudiced, as in California?

Answer: Oklahoma does require a showing of prejudice if late notice is to be a defense. See: Fox v. National Savings Ins. Co., 1967 OK 27, 424 P.2d 19: Insurance company must prove prejudice. See also: Anno. 18 A.L.R.2d 443, 480.