The Starting Point: Capacity Is Presumed
Arizona gives significant weight to the decisions people make about their own property. When someone signs a will or trust, the law presumes they understood what they were doing and that nobody pressured them into it. A challenger must overcome that presumption with real evidence.
It is a rebuttable presumption that a person who executes a governing instrument is presumed to have capacity to execute the governing instrument and to have done so free from undue influence and duress.
A.R.S. § 14-2712(B)The proponent of the document, typically the person trying to enforce it, still has to show basic proof that the document was properly signed. But once that threshold is met, the burden shifts. Anyone who wants to invalidate the document must prove their case by a preponderance of the evidence.
When Undue Influence Is Presumed
The rules change when certain red flags are present. Arizona law creates an automatic presumption of undue influence in two situations. First, when a person in a confidential relationship with the creator was actively involved in procuring the document and stands to benefit significantly from it. Second, when the person who prepared the document (or their spouse, parents, or children) is a principal beneficiary.
A governing instrument is presumed to be the product of undue influence if either: 1. A person who had a confidential relationship to the creator of the governing instrument was active in procuring its creation and execution and is a principal beneficiary of the governing instrument.
A.R.S. § 14-2712(E)(1)Even with this presumption, the beneficiary can still defend the document. They simply need to demonstrate, by a preponderance of the evidence, that the creator acted voluntarily. This statute strikes a balance: it protects vulnerable people from exploitation while still allowing legitimate gifts to stand when properly explained.
