An open account of sums of money due on contract may be assigned. The assignee, including a person who takes assignment for collection in the regular course of business, has a right of action on the account in the assignee’s own name, subject to the defenses and counterclaims allowed against the instruments mentioned in section 539.2, before notice of the assignment is given to the debtor in writing by the assignee. In case of conflict, uniform commercial code, section 554.9404 or 554.9405, controls.
Related provision,