Finding something valuable that someone else lost can feel like good luck, but in California, keeping lost property can lead to serious legal trouble. State law makes it clear that you can face theft charges if you decide to keep something you found without making a reasonable effort to return it.
When keeping lost property becomes theft
Under California law, keeping lost property becomes theft when you know who the rightful owner is or can easily find out who it is, but you choose to keep the item anyway. For example, if you find a wallet with an ID or a phone with contact information, you are expected to make a reasonable effort to return it. Ignoring that responsibility and deciding to keep the item for yourself shows intent to permanently deprive the owner of their property, which meets the definition of theft.
Examples of lost property theft situations
Common examples include finding a purse in a store, a smartphone at a park, or a package delivered to the wrong address. If you know the property belongs to someone else and you keep it, California law may view your actions as theft. The value of the property determines whether the charge is petty theft or grand theft. Petty theft usually applies if the item is worth less than $950, while anything above that amount can lead to grand theft charges.
Why intent matters in these cases
The key factor in these situations is intent. If you genuinely did not know who owned the item or had no way to identify them, you likely won’t face theft charges. However, once you realize or have reason to believe the property belongs to someone else, you must act responsibly. Turning the item in to a store manager, police department, or lost and found service helps demonstrate good faith.
The importance of doing the right thing
Returning lost property not only avoids legal trouble but also shows honesty and integrity. California takes property rights seriously, and the law expects everyone to respect ownership even when no one is watching.


