The United States Postal Service expects Monday to be the busiest mailing day of the year for cards and packages.
USPS spokesman Richard Maher offers this tip to make sure your gifts make it to loved ones:
"Place an extra shipping label inside the box, just in case your shipping label comes off the outside, or in the unlikely event it's damaged or made illegible [so] that we can open that box and get the contents to its destination."
Maher says the agency has brought on seasonal workers and asked employees to work extra hours to make sure packages get delivered before Christmas.
"We're working to stay ahead of the bad weather they're having in other parts of the country. Often times we'll work on Sundays to get the mail on flights and try to beat a storm coming in," Maher said.
Postal workers have already been on duty on Sundays in Los Angeles and New York to deliver packages for Amazon. The move is part of a deal made in November between the online-retailer and the Postal Service.
The Postal Service's deadline for sending priority mail express overnight to ensure gifts arrive by Christmas day is next Monday.