When my work is presented by colleague at conference I don't attend, do I include on my CV?
Credit for a presentation doesn't go only to the person who gives a talk or presents a poster. Everyone involved in the work should be acknowledged.

The standard practice I've used is credit everybody involved in the research on the poster. So if I give a poster presentation, I include any students, postdocs, or colleagues who collaborated on the research. I also indicate who the presenter was if it wasn't me.