Of all the ways a valid claim can fall apart, the most avoidable is also the most final: running out of time. The law sets a firm outer limit for filing a lawsuit, called the statute of limitations, and once it passes, even an ironclad case is generally lost.

The rules differ between New Jersey and New York, and there are shorter, easy-to-miss deadlines layered on top when a government entity is involved. Here is the landscape - with the strong caveat that only a review of your facts can pin down the exact date that applies to you.