Before calling, recommend checking whether your direct contact w/ the plaintiff's instate attorneys can be used to help establish jurisdiction. According to the info someone posted the other day, threshold to establish is pretty low. If the answer is yes or you can't find out, get someone else to call or block caller ID and don't identity yourself.
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"We simply attempt to be fearful when others are greedy and to be greedy only when others are fearful."
-- Warren Buffett