Are there time limits or deadlines for filing a suit?

Yes. A qui tam lawsuit under the False Claims Act must be brought within 6 years of the illegal action, or within three years of the time when the government knew of, or should have known of, the fraudulent activity, as long as it is brought within ten years of the fraud.

More importantly, you must be the first to file your qui tam lawsuit against your employer or former employer, or your case will be barred. You also cannot file a qui tam lawsuit based on publicly-known information, which means that if the media becomes aware of the fraud, you may lose your ability to file a claim.