The IRS spokeswoman warns that all tax payments are due by April 15, even for people who find out they are theft victims after that date. (Often it can take 48 hours to get an e-filing receipt.) IRS computers won't accept electronic payments from e-filers whose returns are rejected because of theft, so last-minute e-filers who owe tax should consider printing a voucher and mailing it with a check.

WSJ: Tax Report: It's Tax ID-Theft Season

After December 2006, the law will prohibit companies from printing the expiration date or more than the last five digits of a credit or debit card on a hard copy receipt.

FORBES: Seven Ways To Foil ID Thieves