What is written evidence of title to tangible personal property known as?

The written evidence of title to tangible personal property is referred to as a bill of sale. A bill of sale is a legal document that serves as proof of the transfer of ownership from one party to another. It typically includes essential details such as the names of the buyer and seller, a description of the property, the purchase price, and the date of the transaction. This document is crucial, especially in transactions involving personal property, as it provides clear evidence that the buyer has acquired ownership from the seller.

In contrast, a title deed usually refers to real estate rather than personal property, making it irrelevant in this context. A warranty refers to a guarantee about the condition of a product or service rather than ownership. A purchase agreement outlines the terms of a sale but doesn't serve as proof of title on its own. Thus, the bill of sale stands out as the proper document that signifies and verifies ownership of tangible personal property.