Utah Citizens will have a pretty tough time getting out of being bound by their signature.
In Utah, a party’s signature carries with it the presumption that the party “knew that they obligated themselves to perform the conditions of the written agreement.” Bennett v. Bowen, 238 P. 240, 245 (Utah 1925); see also State v. Saunders, 699 P.2d 738, 743 (Utah 1985) (where the court held that a signature on affidavit raises presumptions of voluntariness and knowledge of elements and nature of charge).
This time-tested principle states that a signee wishing to set aside and annul a written instrument has “the entire burden . . . to overcome, by clear, unequivocal, convincing testimony, the strong presumption arising in favor of the written instrument signed by the party.” Wilson v. Cunningham, 67 P. 118, 122 (Utah 1901). The written instrument will be held to express the intention of the parties unless the presumption is overcome by “clear, plain, and convincing” evidence “beyond a reasonable controversy.” Id. This means that if you're the one trying to get out of the contract, your attorney will have their hands full.
Even if the written instrument is considered a contract of adhesion which the signee admits to having not read, the contract will generally still be enforceable against the signee. See Berry v. Greater Park City Co., 2007 UT 87, ¶¶ 15–24, 171 P.3d 442, 446–48 (finding that although particular rules may apply to particular factual and legal scenarios, a contract of adhesion signed by the plaintiff was enforceable despite the plaintiff stating that they had not read the contract before signing).
This is where transactional attorneys make their hay. Suffice it to say, it is a good idea to read whatever you're signing before you sign it (or before you don't sign it).