Wis. Stat. § 706.02
There can be no waiver of the necessity of a spouse's joining in a deed of a homestead and no finding of agency will sustain the deed. Wangen v. Leum, 46 Wis. 2d 60, 174 N.W.2d 266 (1970). In pleading a contract that is subject to the statute of frauds, it is not necessary to allege facts to establish that the contract complies with the statute or is within its exceptions. Ritterbusch v. Ritterbusch, 50 Wis. 2d 633, 184 N.W.2d 865 (1971). An option to purchase land must be in writing and cannot be modified orally, but a seller may orally agree to accept payment in full rather than in installments. Kubnick v. Bohne, 56 Wis. 2d 527, 202 N.W.2d 400 (1972). The test of undue influence to set aside a will is also applicable in order to void an inter vivos transfer due to undue influence. Ward v. Ward, 62 Wis. 2d 543, 215 N.W.2d 3 (1974). A general rule used in construing conveyance instruments as to whether they comply with the statute of frauds is to determine if there is ambiguity or uncertainty as to some of the essential elements of the documents. If so, extrinsic evidence may be resorted to in order to determine what was the real agreement or intention of the parties. However, the document itself must provide some foundation, link or key to the extrinsic evidence. Edlebeck v. Barnes, 63 Wis. 2d 240, 216 N.W.2d 551 (1974). An oral contract for the conveyance of an interest in land is void unless there is a memorandum that conforms to the statute of frauds. Trimble v. Wis. Builders, Inc. 72 Wis. 2d 435, 241 N.W.2d 409 (1976). When a contract for the sale of land with an indefinite description is taken out of the statute of frauds by part performance, extrinsic evidence admissible but for the statute of frauds may be introduced to provide the description. Clay v. Bradley, 74 Wis. 2d 153, 246 N.W.2d 142 (1976). The question under sub. (1) (b) of whether property boundaries are identified to a reasonable certainty is for the jury to determine with the aid of all competent extrinsic evidence. Zapuchlak v. Hucal, 82 Wis. 2d 184, 262 N.W.2d 514 (1978). The homestead defense under sub. (1) (f) is not defeated by s. 706.04, but a tort claim may exist against a signing spouse who misrepresents the non-signing spouse's acquiescence. Glinski v. Sheldon, 88 Wis. 2d 509, 276 N.W.2d 815 (1979). The defense of the statute of frauds is waived if not raised in the trial court. Hine v. Vilter, 88 Wis. 2d 645, 277 N.W.2d 772 (1979). A mortgage fraudulently executed by the use of a forged signature of one grantor was wholly void. State Bank of Drummond v. Christophersen, 93 Wis. 2d 148, 286 N.W.2d 547 (1980). When a contract for the sale of land and personalty is not divisible, the contract is entirely void if this section is not satisfied. Spensley Feed v. Livingston Feed, 128 Wis. 2d 279, 381 N.W.2d 601 (Ct. App. 1985). The homestead signature requirement of sub. (1) (f) must be waived affirmatively by actual signing of the mortgage. A failure to plead the statute of frauds as an affirmative defense did not constitute a waiver. Weber v. Weber, 176 Wis. 2d 1085, 501 N.W.2d 413 (1993). A quitclaim deed of a married couple's homestead from one spouse to the other is not valid to alienate the grantor's interest in the property in any way that would eliminate either spouse's contractual obligations under a mortgage containing a valid dragnet clause. Schmidt v. Waukesha State Bank, 204 Wis. 2d 426, 555 N.W.2d 655 (Ct. App. 1996), 95-1850. An in-court oral stipulation could create a mortgage interest in property, but a homestead conveyance must bear the conveyor's signatures. Because the stipulation lacked signatures, it was not a mortgage that could defeat the homestead exemption under s. 815.20. Equitable Bank, S.S.B. v. Chabron, 2000 WI App 210, 238 Wis. 2d 708, 618 N.W.2d 262, 99-2639. If the language within the four corners of a deed is unambiguous, the court need look no further for the parties' intent. Eckendorf v. Austin, 2000 WI App 219, 239 Wis. 2d 69, 619 N.W.2d 129, 00-0713. Spouses may affirmatively waive the homestead protection in sub. (1) (f) in a premarital agreement. Jones v. Estate of Jones, 2002 WI 61, 253 Wis. 2d 158, 646 N.W.2d 280, 01-1025. A conveyance that "identifies the land" as required by sub. (1) means the conveyance must identify the property with "reasonable certainty." "Reasonable certainty" means that by the aid of the facts and circumstances surrounding the parties at the time the court can with reasonable certainty determine the land which is to be conveyed. It does not, however, necessarily require a legal description. Anderson v. Quinn, 2007 WI App 260, 306 Wis. 2d 686, 743 N.W.2d 492, 06-2462. Parol evidence in the context of the statute of frauds does not operate to supply fatal omissions of a writing but rather to render the writing intelligible. A clear distinction must be drawn between the proper admission of extrinsic evidence for the purpose of applying the description to identified property versus the improper supplying of a description or adding to a description that on its face is insufficient. As the description "remaining acreage" was, on its face, insufficient to identify the specific property, parol evidence would not be admissible under the statute of frauds. 303, LLC v. Born, 2012 WI App 115, 344 Wis. 2d 364, 823 N.W.2d 269, 11-2368. The mortgage in this case was equitably assigned to the holder of the original note by operation of law upon transfer of the note. Therefore, equitable assignment of the mortgage was not barred by the statute of frauds under this section. Dow Family, LLC v. PHH Mortgage Corporation, 2014 WI 56, 354 Wis. 2d 796, 848 N.W.2d 728, 13-0221. Mere ambiguity does not render a contract unenforceable vis-À-vis the statute of frauds. Rather, when a conveyance includes a description of property that can be applied in multiple ways, the statute of frauds requires that parol evidence of intent be connected in some way to the language of the agreement. Prezioso v. Aerts, 2014 WI App 126, 358 Wis. 2d 714, 858 N.W.2d 386, 13-2762. When the only signer of two mortgages was a married person, at the time he executed the mortgages, and he had an interest in the homestead that was alienated by those conveyances, under the plain language of sub. (1) (f) the mortgage transactions were invalid from the start because they were not signed, or joined in by separate conveyance, by or on behalf of each spouse. As such, whether the non-signing spouse had waived her interest in the homestead property by deeding the property to the signing spouse did not need to be determined. U.S. Bank National Association v. Stehno, 2017 WI App 57, 378 Wis. 2d 179, 902 N.W.2d 270, 16-0193. The statute of frauds does not bar a tort action for intentional misrepresentation. Winger v. Winger, 82 F.3d 140 (1996).