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MIAMI (CBSMiami) – Are your holiday cards sign, sealed but not yet delivered? You’re not the only one. In fact, if you plan on sending a card or package Monday, you are one in several million.

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Lines at most post offices were long Monday as December 15th, according to the United States Post Office, is the busiest mailing day of the year.

In fact, USPS says more than 640-million cards, letters and packages are expected to be processed Monday.

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Lorraine Jones is not exactly Santa Claus, but she knows that a visit to the post office is what she needed to do to make Christmas happen for her six-year-old granddaughter.

“I am mailing my grandbaby her favorite, most favorite toys: Disney’s cartoon character, Frozen.”

Xiro Rubiales, another customer, was able to avoid the crowds by leaving a packed post office for another one that turned out to be less crowded.

Enrique Suarez, the U.S. Post Service’s Postmaster in Miami, said, “it’s technically the day most people have filled out their cards, they have their packages ready to mail to their relatives around the country.”

Between 500-700 seasonal employees are hired to get all those carefully chosen gifts all over the country.

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The most common item being dropped off at the post office, Suarez said, are not packages.

“Forty-five percent of that will be people mailing Christmas cards to their friends and family around the country,” said Suarez.

The Postal Service it’s delivering seven days a week in some areas—including Christmas Day.

Local postal workers said the cards that are mailed Monday, within Miami-Dade, Broward, and Monroe Counties, will arrive Tuesday. For the rest of the country the cards should arrive in two to three days.

Those planning on sending a package, with hopes of it being delivered by Christmas Day, must drop it off by next Saturday.

USPS Domestic Shipping Deadlines:
• December 15th for standard post
• December 20th for First Class and Priority Mail
• December 23rd for Priority Mail Express

For specific information regarding international mail and military mail, click here.

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