Identity theft hits millions of Americans each year. What many business executives don’t know is that ID thieves are using a variation on the crime to prey on legitimate companies.

What’s the crooks’ modus operandi ? They typically alter business records filed with a state government so they can impersonate companies in good financial standing. For example, thieves might change official documentation that lists a business’ address, corporate officers, or its registered agents. Using altered documents, they’ll get lines of credit in the company’s name and siphon off money. Once they’ve drained a business dry, they move on to the next victim, leaving the company with its credit — and reputation — in shambles. Banks and retailers take a hit, too, with a stack of worthless receivables rung up by the con artists.

The National Association of Secretaries of State (NASS) is taking the lead on getting out the word about business identity theft, steps to prevent it, and what your business can do to fight back. What’s NASS’ advice for businesses?