Consumers considering security freezes at the big three — Equifax, Experian and TransUnion — also should consider requesting one with Innovis. The freeze is free and can be done online at www.innovis.com/personal/securityFreeze. Freezing credit reports prevents credit bureaus from releasing people’s files without their permission. Because most businesses won’t extend credit without checking a consumer’s credit history, ID thieves are blocked from opening fraudulent accounts.