Most recessive pieds will have a pied patch on the back of their head, which can extends down the neck and around the sides of the head on some birds.
Recessive pieds will have varied pied markings on the wings. The edges are often a bit faded and more grizzled.
Most recessive pieds have a mostly pied chest and throat, with a patch of color between their legs on their lower belly area.
Main tail feathers should be white, or grizzled grey