More than 380,000 people in Florida will be receiving voter registration forms in the mail from a group seeking to increase participation from women, minorities and youth.

"More than four million people of color, unmarried women and millennials aren't registered in Florida, which means they aren't able to have their voices heard in our democracy," said Page Gardner, founder and president of the Voter Participation Center.

"The 'Rising American Electorate' is 61.3% of the voting eligible population in Florida, so the electorate should be reflective of their strength in the population."

The Democratic-aligned group said research indicates 30 percent of those RAE voters who voted in 2016 aren't likely to vote in 2018.

The group, which says it has registered nearly 4 million people since 2004 — 452,000 in Florida — is launching its largest effort this election and has already sent 7.2 million registration forms across 20 states: AZ, CO, FL, GA, IN, MI, MN, MO, MT, NC, NM, NV, OH, PA, TN, TX, VA, WI, WA, WV. This next wave goes out June 15.

"VPC has generated 187,000 applicants via mail and digital so far this cycle, including 81,000 millennials, 91,000 unmarried women, and 109,000 people of color," the group said.

Its registration forms have generated complaints.

Brevard Supervisor Lori Scott in March alerted her county's voters to letters being sent by VPC and a sister organization, the Center for Voter Participation.

"Unfortunately, and historically, the VPC and CVI pull information for their maikings from various unverified sources," Scott said. "Previous mailings have resulted in voter registration applications being sent to deceased persons, minor children and even pets. Mailings have also been sent to registered voters, which creates unnecessary confusion and concern."

Group spokesman Kevin McAlister said, "VPC is constantly improving its process of making its data more accurate, including working with some state officials who review our lists before the mailings."

More from the group:

The Rising American Electorate is the majority of the voting eligible population (VEP) in Florida – 61.3 percent – yet the RAE is only 57 percent of those registered in Florida.  It's critical to register more members of the RAE so the electorate is reflective of the population.  Right now, 38.1 percent of the RAE in Florida is unregistered. Specifically:

●      Unmarried women make up 26.7percent of Florida's VEP but are 26.2 percent of the total registered voters. 34.5 percent of unmarried women are not yet registered to vote.

●      Latinos make up 19.9 percent of Florida's VEP but are 18.5 percent of the total registered voters. 38 percent of Latinos are not yet registered to vote.

●      African Americans make up 14.4 percent of Florida's VEP and are 12 percent of the total registered voters. 44.8 percent of African Americans are not yet registered to vote.

●      Millennials make up 25.4 percent of Florida's VEP but are 21.7 percent of the total registered voters. 43 percent of millennials are not yet registered to vote.

Times Tallahassee bureau chief Steve Bousquet contributed to this report.