Consumer Reports survey results on what people gave in 2011:
Cash, check, or gift card: 13 percent
Gift: 8 percent
Nothing: 79 percent
Total median value: $20
What Emily Post suggests: The US Postal Service prohibits mail carriers from accepting cash gifts, gift cards, or any other form of currency. Mail carriers are allowed to accept snacks, beverages and perishable gifts that are not part of a meal and small gifts of no more than $20 in value. Perishable items that are worth more, such as large fruit baskets or cookie tins, must be shared with the entire branch office.