https://www.vetnurse.co.uk/f/nonclinical-discussions/22298/changing-microchip-details Apologies if this has already been posted in the forums but I can&#39;t find it so.... Not in practice any more and one of my keepers has just rehomed two siamese from a rescue group. He was told they are chipped so has trotted off home with my transponderen-USTelligent Community 10https://www.vetnurse.co.uk/thread/144783?ContentTypeID=1Sat, 03 Aug 2013 18:11:08 GMT1a0763ec-3885-442c-853e-6cef656dfec5:8c49a689-0bd6-4170-a87d-b649b4aa484eJulie-Anne Wilson<p>Contact any chip company and they can tell you which company the chip belongs to, contacting the right company will get you the correct way to change the details over.</p> <p>When I rehomed my cat, there was a 4 week waiting period since I didn&#39;t have any proof of change of ownership from the previous owner. &nbsp;Having a letter or receipt from the previous owner means it will get changed quicker.</p><div style="clear:both;"></div>https://www.vetnurse.co.uk/thread/144779?ContentTypeID=1Sat, 03 Aug 2013 13:25:21 GMT1a0763ec-3885-442c-853e-6cef656dfec5:a22e64b9-e424-4a96-a7df-881aea2b7719Vickipr<p>He&#39;d probably have to call Petlog: 0844 4633 999, if it&#39;s not one of their chips, then they can direct him in the right direction!</p> <p>Vic x</p><div style="clear:both;"></div>