I shall begin: No license is required to call one's self a psychotherapist. (Karen's looking for her glasses, but the source is the current issue of Reader's Digest--if I'm mistaken, please correct me. I'm not mistaken? Do NOT be afraid to ask for credentials, past experience, success rate, et al.. and yeah, I know, it's a pretty vulnerable state to be in to practice being assertive, but you might as well start at the beginning, yes?)
<--not making fun--you are not only allowed, you'd be considered responsible to ask to see licenses, diplomas, etc.