We will give our part time nanny a small gift, card and cash of c. 1 week's pay for Xmas. Normally we pay her monthly by bank transfer. My question is, is it weird/tacky to just put the cash in an envelope? She is part time so it's a decent amount but not a crazy amount of physical cash to have. It's kind of my preference as it seems less awkward than making a thing of saying we are going to transfer her extra. But it still seems a bit awkward. Thoughts on which is better?