The Chartered Trading Standards Institute (CTSI) has also issued a warning about the site which asks for a £15 charge.
The City of Chino Hills in partnership with the Inland Valley Humane Society will host a mobile vaccination and microchip clinic for dogs and cats from 5 to 6 p.m.
Murphy's owner flew from Southern California to San Antonio to reunite with him after many years of keeping hope.
A major provider of microchips for domestic animals has unexpectedly closed, leaving many owners in the U.S. at risk of being unable to relocate stray pets.