If a credit card issuer has declared you deceased, you can certainly sue for any damage this has caused you. Let's say you went to obtain a mortgage loan or car loan, and the loan was denied simply because it shows you died! You need to have solid damages and not simply have it be a clerical mistake. Contact the credit card company and a) verify your identity and b) make sure they immediately under the Fair Credit Reporting Act send a correct to all credit reporting agencies and make sure they send you a copy of the letter of correction the credit card company sent to the credit reporting agencies.