(Alan Rappa) Don’t want your mailbox crammed with circulars? Neither did a Massachusetts resident who used a credit card at Michaels and was asked for her ZIP code to complete the transaction in 2011. She’s not alone — a few years ago California ruled against retailers that asked customers for ZIP codes when using credit cards. A state Supreme Court recently ruled in her favor, reports the Patriot Ledger. Michaels would allegedly use the ZIP code information to look up customers’ home addresses and phone numbers in order to send a barrage of unsolicited sales pitches. The state court says that practice breaks Massachusetts’ consumer protection law, a ruling praised by consumer advocates. “It’s a good, strong finding for consumers,” said the legislative director for the consumer group MassPIRG.