Jordi Cuixart, president of the separatist group Omnium Cultural, announced the ballots were being distributed during a rally in Barcelona.
"Here are the packs of ballots that we ask you to hand out across Catalonia," Cuixart said.
Spanish police have confiscated millions of ballots in recent days as part of a crackdown to stop the October 1 vote, which has been suspended by Spain's Constitutional Court.
Catalonia's separatists have pledged to hold the vote regardless of the central government's wishes and rallied today in public squares in Barcelona and other towns in the region. Many carried pro-independence flags and signs calling for the independence vote and urging the "Yes" side to victory.
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The crowds were asked by secessionist politicians and grassroots groups to also print and distribute posters supporting the vote.
"I ask you to go out and vote! Vote for the future of Catalonia!" Carme Forcadell, the speaker of Catalonia's regional parliament, told a Barcelona crowd.
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