I’ve finally followed through on something I learned about on the forum. I ordered tags to take with me on sits. After discussing it with owners, I will add my tag to the pet’s collar, if we think it’s appropriate. What comes to mind for me is maybe the supposedly indoor cats who are known escape artists, or may more likely be with sitters. I’m not one to walk a dog off-leash, so that would be less of an issue, but maybe still useful.
I ordered these through Amazon, and had a good allowance for characters inscribed on both sides. These are just over 1" in size, but they had a range of sizes. I added my country as my preferred sits outside of Canada are in Mexico and many people there have phone plans that cover Canada. In hindsight I should have perhaps added my country code, but no doubt these will be better than only the owner’s tag, if the owner is not reachable for some reason.