heyas; also send them an actual bill. i did some work for a nice magazine, but the payment was not forthcoming... for no specific reason. so after being patient, i sent them a bill. sometimes it just takes some paperwork to get the money machine going. if the payroll department doesn't know they owe you money.... i got that advice from... the graphic artists guild, i think. after some bills and late-bill notices, then you worry about suing them. a database would be cool... if any of the companies stay in business long enough to ever try to hire more artists.