Yeah, I've always got the "with whom" part.
Here's the sentence I was having trouble with last week, in a letter to my city utilities dept.
"Ms. Maloney is the person who(m?) your department authorized service for."
Now, I "felt" it should be "whom", but then decided that these were city workers reading it(probably high school graduates, at best), so I decided it probably didn't matter.
Stupid, deadbeat bi*ch didn't pay her water bill(and ran it up to $140, not to mention $3200 in rent/damages!), and the city's trying to make the property owner pay her utility bills. Said property owner is giving them a fight!
