No partner can alienate more than his own share, even if they are partners in all goods.

Explanation

A co-owner or partner may dispose of only his own interest in the common property — he cannot convey, encumber, or destroy the shares belonging to his fellow partners without their consent.

Where this applies

• One of three co-owners of a rental property tries to sell the entire building without the consent of the other two, and the court holds the sale void as to the other two-thirds because each partner can only convey his own share.
• A business partner pledges all of the partnership's equipment as collateral for a personal loan, and the court limits the pledge to only that partner's interest because he cannot encumber what belongs to his co-owners.
• A co-heir attempts to lease the entire inherited family farm to a developer, but the court rules the lease is effective only as to her fractional share because no co-owner can alienate more than she owns.