For “care of,” use the abbreviation “c/o.” It’s what you use when sending mail to someone whose address you don’t know. Mail is also occasionally delivered to people at their places of business.
When sending mail “in care of,” write “c/o” under the recipient’s name and then add the name of the individual or organisation to whom the mail should be addressed. Both handwritten and electronic mail addresses consist of a “c” followed by a forward slash and then a “o.” If you’re using a computer, you can create a “c/o” symbol by going to the “Insert” menu, clicking “Symbol,” and entering the number 2105.
