Time is almost up to sign up for free credit monitoring if your tax information was hacked last September, as the registration deadline is Sunday.

It's been five months since S.C. Gov. Nikki Haley's office announced an international hacker stole 3.8 million Social Security numbers and several thousand credit card numbers and business tax filings from the S.C. Department of Revenue.

To help protect people, the state entered into a contract with cyber-security firm Experian to offer one year of credit monitoring.

More than one-third of the 3.8 million consumers whose S.C. tax return information was compromised have enrolled for a free year of Experian credit monitoring.

Experian's “ProtectMyID” system issues alerts when a credit report reflects new activity, like adding a new credit card or personal loan. It is the responsibility of the individual who receives the alert to determine if the new information is accurate and reflects recent financial activity known to the individual or if it is unknown and possibly fraudulent.

If you are signed up and you believe that information on your credit report may be the result of fraud, membership gives you access to a fraud resolution specialist who will assist you.

As well as the individual protection being paid for by the state, Experian's Family Secure plan is open for registration until May 31. This is to register minor children who may have had their Social Security numbers stolen.

The Department of Revenue is advising those signing up to use the online service, if possible, so as to avoid possible lengthy waits on phone lines.

How to sign up for free credit monitoring:

Online – visit www.ProtectMyId.com/SCDOR and enter the code SCDOR123

By phone – call 1-866-578-5422 today and Sunday between 11 a.m. and 8 p.m.