n. 25B6; verb
clients are being overcharged : SWINDLE, charge too much, cheat, defraud, fleece, short-change; informal rip off, sting, screw, rob, diddle, do, rook; N. Amer. informal gouge.
the decoration is overcharged : OVERSTATE, overdo, exaggerate, over-embroider, over-embellish; overwrite, overdraw.