A more thorough explanation:

Definition: Attorn (pronounced uh-torn) is a verb that means to agree to become a tenant of a new landlord or to transfer money or goods to someone else.

Examples:

• When the building was sold, the tenants had to attorn to the new landlord and sign a new lease agreement.
• The company attorned the funds to a different bank account for security reasons.

The first example shows how attorn is used in the context of landlord and tenant relationships. When a property is sold, the tenants must agree to become tenants of the new owner, which is called attorning. The second example shows how attorn can be used in a financial context, where money is transferred from one account to another.