Same with the resumes. It's ok to have a section and list a few certificates, but quite regularly I see people put logos of some certificate programs on top of the resume, next to their name. It doesn't make a good impression.

I worked with someone who was a certified yoga instructor and uninronically had it on her business cards and email signature.

She was a tech consultant. After I looked up “CYT” I think that made me not think positively of her. I mean it’s good that someone is proud of their accomplishment, but such a weird thing to announce to the world.

I know nothing about yoga instruction, but I have a qualification that might be parallel and acquiring it certainly required a lot of dedication and practice. I guess I'd say ask why it's on the resume instead of assuming; you might hear something interesting.

I did ask, she said something like she was proud of the credential.

There’s lots of things that require effort and people are proud of. Not everyone needs to know.

Being on the resume makes sense as lots of stuff is on there. I think it’s pretentious because it’s on business cards and email signatures.