Rome, December 28 - Italy's tax collectors seized 11 billion euros in unpaid taxes from evaders as of early December, the national revenue agency announced Friday. That's a bit less than the amount recovered in 2011's fight against tax evasion, the agency admitted. During the same period last year, 12.7 billion euros in unpaid taxes were collected. In 2013, the agency says it will be applying new rules to help in the fight against tax evasion. In one major case this year, it said, a group of companies in the Marche region issued false invoices worth 226 million euros that created 32 million euros in unreported - and untaxed - income. As a result, seven people have been charged with criminal conspiracy.