My dog doesn't have collar but when we go for walks her leash which is a easy slip through like a hunting leash where its just easy to take on and off has her tag on it. I carry her license and dog park pass on my truck keys since where ever I am she usually is and that's the only way I would remember to take them lol. She does have a microchip though which I do update on line. 24/7 Watch is the web sight. I am not a big fan of hearing tags following me since shes my shadow any ways and I already know she will never let me out of her sight. She usually just gets bandanna's changed out every now and then. She has like 20 of them