JACKSONVILLE, Fla. -- In the past, thousands of votes on election day were invalid and it was all because of a signature.

In an age where we rely on computers and smartphones, this is a story about handwriting.

Handwriting: the election and votes that are cast but not counted.

This election is attracting a record number of voters, some people have never voted before but are making sure their voice is heard this year.

Florida is a key state that both candidates hope will help get them to that magic number.

Handwriting can play a big role in this year’s election.

In Florida during the 2012 election, President Obama won the state by a little more than 74,000 votes.

In that same election more than 23,000 ballots were rejected because the handwritten signature on the vote-by-mail ballot didn't match the one on file in the voter registrations office.

During the 2012 election in Duval County, 264 ballots were rejected due to a signature difference.

“In Nassau you could count on your fingers the number of vote-by-mail ballots that weren't counted. Big counties have a much bigger problem,” said Carla Voisard, Nassau County Democratic Party Chair.

This year the Florida Democratic Party sued the state, saying it was not fair for votes to be rejected without the voter having a chance to prove their signature is theirs.

Sunday a federal judge agreed with the Democratic Party's stance.

"Everybody's signature changes and you don't even know it changes. Or it could be someone who had an accident or a stroke and more happens to seniors,” said Voisard.

The ruling now means county elections offices have to notify voters if their signature on a mail ballot does not match their voter registration form.

You have until the day before the election to make the change.