Information that would help local authorities ensure their billing details are accurate for a property may be held by parties that are neither the owner nor occupier of the property.
Gall gwybodaeth a fyddai'n helpu'r awdurdodau lleol i sicrhau bod eu manylion bilio'n gywir ar gyfer eiddo gael ei dal gan bartïon nad ydynt yn berchennog nac yn feddiannydd yr eiddo.