My post count is Majestic
If you are going to do this it is up to you to resource the person, get them infront of the client so they can meet and assess them. You then have to do a handover at your cost to the new person so they can pick up your work and continue where you left off. This could take weeks and I assume the other person will want paying.
It's not just a matter of throwing a new body at a client after you've left. They might just as well go back to the agency and get them to look for the right person... which is all likelihood is what is going to happen anyway.
'CUK forum personality of 2011' - Winner - Yes really!!!!