SAN FRANCISCO » California prosecutors sued Uber on Tuesday over the ridesharing company’s background checks and other allegations, adding to the popular startup’s worldwide legal woes.

San Francisco County District Attorney George Gascon also announced that Uber competitor Lyft agreed to pay $500,000 and change some of its business practices to settle its own lawsuit. Lyft will have to pay only half the fine if it complies with the agreement’s terms over the next year.

The lawsuits filed in San Francisco Superior Court are the latest legal hurdles to confront the nascent ridesharing industry. The industry in general — and Uber in particular — have been battling lawsuits and regulatory issues over whether the businesses are regulated taxi services or app-making technology companies.

"Uber continues to misrepresent and exaggerate background checks on drivers," Los Angeles District Attorney Jackie Lacey said. "It’s not our goal to shut them down. What we’re saying is their advertising is false."

Lacey partnered with Gascon in a probe of the ridesharing industry. A third company — Sidecar — is still under investigation and could face a lawsuit of its own if it can’t reach an agreement with prosecutors, Gascon said.

Uber’s lawsuit accuses the company of misleading consumers by claiming it conducts "industry-leading" background checks on its drivers. Gascon said that claim is false since the company doesn’t fingerprint its drivers.

Uber uses information supplied electronically by its applicant drivers for background checks. But applicants can get around those checks by using stolen or false identifications, Gascon said.

"Only a fingerprint-based process can ensure this is not happening," he said.

Uber spokeswoman Eva Behrend defended the company’s role in California in a statement that did not address specific allegations.

"Uber is an integral, safe and established part of the transportation ecosystem in the Golden State," Behrend said. "We will continue to engage in discussions with the district attorneys."

Uber also is being sued for charging passengers an additional $4 for trips to and from San Francisco International Airport even through the company lacks a permit to do business at the airport and neither Uber nor its drivers pay the airport fee.

Taxis must pay for a permit to do business at San Francisco’s airport and other major airports in the state.

Further, Uber is being sued for charging passengers an additional $1 per trip for a "safe ride fee," which the company claims helps pay for its "industry-leading" background checks.

Finally, the lawsuit accuses the company of failing to obtain approval from state regulators on how drivers calculate fares. Taxi cab meters are tested and verified by an agency in California’s Department of Agriculture.

Government entities around the globe are grappling with how to regulate and monitor ridesharing companies. Taxi and limousine drivers and companies complain that the ridesharing companies should be subjected to the same regulations and fees they face around the world.

The ridesharing companies counter that their drivers are private contractors who use the startups’ technology to find customers in need of rides.

Uber, in particular, is fighting numerous legal and regulatory battles as it aggressively expands worldwide.

The city of Portland, Oregon, on Monday filed a lawsuit seeking to halt Uber’s expansion in that city, arguing the company failed to obtain the proper permits.

A Nevada judge temporarily barred Uber from operating in the state.

Overseas, police in India questioned an Uber executive about the company’s claim it conducts comprehensive background checks. And a top official called for the taxi-booking service to be banned nationwide after one of its New Delhi drivers was arrested Sunday and accused of rape.

Separately, Spain has barred the company’s operation, and Thailand said it was illegal for private cars to be used as taxis and threatened fines of $60 for each violation.

Nonetheless, the San Francisco-based Uber raised $1.2 billion in its latest round of funding from venture capitalists, a sign investors were little fazed by the legal woes.

The latest investment put a value on Uber at $40 billion.

Associated Press special correspondent Linda Deutsch in Los Angeles contributed to this report.