This problem can be solved by the use of universal microchip scanners, which are readily available. (tampabayvets.net)
Virtually all shelters and veterinary clinics are equipped with microchip scanners to help lost pets return home. (chesapeakehumane.org)
Animal Control Officers have microchip scanners in their vehicles and may be able to return the pet to it's owner without it ever having to step foot in the shelter. (harfordshelter.org)