Why one white duck looks like every white duck
A lost Pekin gives a finder almost nothing to work with, because the breed standard is uniformity itself: creamy white feathers, a bright orange bill, orange legs and feet, and a plump upright body shared by every bird in every backyard flock. Unlike a patterned chicken or a marked horse, a Pekin picked up near a pond could belong to any of several households within walking distance, and Pekins swim and waddle far enough to cross those boundaries in an afternoon. Identification therefore has to be manufactured by you in advance: a band, close photographs and written quirks are the whole case for proving the duck in a stranger's arms is yours.
The small differences a Pekin actually has
Look at your Pekin the way a finder will, hunting for anything that breaks the white uniformity. Check for a small crest tuft at the back of the head, a bill that is paler, deeper orange or marked with dark bean spots, one wing carried slightly lower, a toe that turns in, staining or a bare patch that persists on the breast, and whether her tail tilts up sharply or rides flat. Note her waddle and her voice: hens quack loudly and individually, and a recording of her call can confirm identity when looks cannot. Record her weight class honestly, too, because a notably large or small Pekin among standard birds is a usable clue for someone sorting several found ducks.
Banding and photographing a bird built to slip identification
Fit a correctly sized, numbered leg band and check it after swims and during feather growth, since a Pekin's smooth leg and constant water work can shift a poorly fitted band. Photograph her dry and out of the water: wet white feathers clump and grey, hiding crest tufts and wing carriage that show clearly on a dry bird. Take both sides, a front view showing bill shape, a close shot of the banded leg, and one picture beside a flock mate for scale. If she lives in a group of Pekins, photograph the group and mark her position-based habits, such as always sleeping at the pond edge, because flock behaviour sometimes identifies her before her body does.
Speed matters more for a duck than for almost any bird
A loose Pekin cannot fly meaningfully and is exposed to dogs, traffic and predators from the first hour, so the search has to start around the water she knows rather than widening slowly. Tell finders she is likely to stay near ponds, ditches and damp ground, to approach her calmly with a barrier or net rather than grabbing, and to check her band number and bill markings against your record before assuming she is a wild or dumped bird. A Pekin found waddling along a lane in daylight has almost always come from a garden pond nearby, so knocking on the closest doors with ponds is genuinely worthwhile in the first search. Getting word to the people nearest that water immediately is what KinsLe's Lost Pet Alert System is built for, alerting nearby Circle of Love members for free while a finder who has already caught her can message you directly through the alert.