In Poehnelt v. Poehnelt, 94 Wis. 2d 640, 655-56, 289 N.W.2d 296 (1980), the paternal father mistakenly paid support beyond the time when he was legally required because the divorce complaint listed his children's birthdates inaccurately. See id. The Court characterized the receipt of support paid by mistake as unjust enrichment and held that a circuit court should allow recovery in such instances. See id.