For a will to be valid, the testator must not have created it under which condition?

A will is valid when the testator creates it freely and voluntarily, without being subjected to undue influence or significant mistakes. Undue influence refers to situations where someone exerts pressure on the testator to the extent that it compromises the testator's free will, leading them to make decisions they wouldn't have otherwise made. This condition is vital because it protects the integrity of the testator's intentions and desires regarding the distribution of their assets after death.

Creating a will under undue influence can render it invalid, as it may not accurately reflect the true wishes of the testator. Similarly, if the will is drafted as a result of a mistake—whether factual or legal—this can also undermine the document's validity. Thus, ensuring that the testator's decisions are made without coercion or errors is essential for the enforceability of the will.

In contrast, a will can be valid when it is created in writing, designed with a clear understanding of the testator’s assets, and executed in the presence of family members, as these factors do not inherently compromise the testator's intent or capacity.