Target says that between Black Friday and December 15th, point of sale registers were hacked company wide and over 40 million credit and debit cards were seized. Target hasn't really said much on what customers should do. Leo says that the safest thing to do is assume your card had been grabbed and notify your bank. You could spend the next year checking your statements, but Leo says to simply get a new card and close the other account. Leo also says that there was no breach in Target stores in Canada because they require both a chip in your credit card and a PIN. Without both of these pieces, you can't complete a transaction.
Leo also says that you can run a free credit report at AnnualCreditReport.com. Do not go to freecreditreport.com because it isn't actually free.
Target Confirms Millions Of Customer Credit Cards Have Been Hacked Since Black Friday (Business Insider)…