Which of the following is NOT an involuntary source of title?

A will is a voluntary source of title because it reflects the intentional wishes of a person regarding the distribution of their property after death. The person creating the will (the testator) actively decides how their assets will be allocated among beneficiaries, and this decision is formalized through legal documentation. Therefore, a title acquired through a will typically involves active participation from the individual, making it a voluntary act.

In contrast, the other options—foreclosure, judicial sale, and bankruptcy—represent scenarios where title is transferred without the direct voluntary decision of the property owner. These processes often arise from legal actions or financial distress, leading to a change in ownership that does not stem from the owner's personal choice. Hence, among the choices provided, a will distinctly stands out as a voluntary means of transferring title rather than an involuntary source.