Credentialing Trademark Search
If you are in the process of developing a new credentialing program, one thing you'll want to do when considering a designation and associated acronym for the certificants or certificate holders is to conduct a a trademark search. In case you don't know where to start, here's the link to conduct the search.
Many associations have their legal counsel conduct an official search for them, which is great, but it's still a good idea to do your own search so you can rule out some obviously "taken" choices early on.