A more thorough explanation:

Mysterious disappearance refers to the loss of property under unknown or baffling circumstances that are difficult to understand or explain. This term is commonly used in insurance policies that cover theft.

For instance, if a person leaves their laptop on a table in a coffee shop and returns to find it missing, it could be considered a mysterious disappearance. Similarly, if a valuable piece of jewelry disappears from a person's home without any signs of forced entry, it could also be considered a mysterious disappearance.

However, it's important to note that the addition of the words "mysterious disappearance" to a theft policy does not transform it into an "all loss" policy that covers lost or misplaced items. The policy still only covers theft.

These examples illustrate how mysterious disappearance can occur without any clear explanation or evidence of theft. It can be frustrating for the owner of the lost property, and insurance policies that cover mysterious disappearance can provide some financial relief.