Stacey, I'm a CPA, (although I'm not working public accounting at the moment), so I'm familiar with the field. One of the Ls I talked to a few months ago mentioned it as potentially being useful in my case. If you think your H is hiding assets, it totally could be worth it. Ask your L.
I vote no on the Christmas card. But that's just me. I sent cards with all five of our names on them, so what do I know?
