Dear Ms. Cards Etiquette,
Is it okay to send a condolence card to a business associate at their place of employment?
Sympathy cards are always appreciated no matter where you send them. It is more proper to send the card to your friend’s home, but if you only know them through business, then it is OK to send to their business address.
This is one of those times when you’ll need to know how to properly send the envelope so the card will arrive at your friend’s desk. You’ll need to send the card to your friend’s name “Care of” the business where he or she works. (Please see this post for more information on how to do that.)
Since this is a condolence card to a business friend, you’ll want to keep the card simple with only a line or two and your name, unless, however you know this person very well and know of the circumstances regarding the death in his family.
I’m thinking, however, since you do not know your business associate’s address, you probably do not know a whole lot about the death that occurred, so it is most proper to be formal.
“I am very sorry to hear of the loss of your friend/ mother/ father/ whomever” followed by your signature.