Idaho Code § 11-725

Upon the return day of the order of notice, or upon such other day to which the trial may be postponed, if the alleged assignee fails to appear, or appearing, fails to assert any claim as such assignee, the alleged assignment shall be disregarded, but if he shall appear and set up a claim as assignee, the existence, force and validity of the alleged assignment shall be tried as similar issues between judgment creditor and judgment debtor, and such judgment shall be rendered as shall be conformable to the facts and the law.