Collecting zip codes in California just got a lot more complicated. Despite appellate court rulings holding otherwise, the California Supreme Court ruled a retailer that requests and records zip codes from customers paying by credit card violates California’s Song-Beverly Credit Card Act of 1971. The court concluded zip codes alone constitute “personal identification information” under the Act, and expressly declined to make its ruling prospective only. The Act authorizes penalties of up to $250 for the first violation and $1,000 for each subsequent violation — a tempting target for plaintiffs’ lawyers, who have begun filing cases in droves.