Checkers Drive-In Restaurants is notifying guests about a data security issue involving malware at certain Checkers and Rally's locations in 19 states, according to a news release.

The brand said that after becoming aware of the issue, data security experts investigated and coordinated with federal law enforcement, while dispatching third-party security experts to contain and remove the malware, according to the release.

The investigation found malware was installed on Checkers and Rally's POS systems at different locations, in an attempt to access payment card data. The malware, according to the release, was designed to gather information including cardholder names, payment card numbers, card verification codes and expiration dates. 

A list of locations and respective estimated dates of exposure is available at www.checkers.com/security-issue. The states affected include:

• Alabama.
• Arizona.
• California.
• Delaware.
• Florida.
• Georgia.
• Illinois.
• Indiana.
• Kentucky.
• Louisiana.
• Michigan.
• Nevada.
• New Jersey.
• New York.
• North Carolina.
• Ohio.
• Pennsylvania.
• Tennessee.
• West Virginia.

Further assistance is available by phone from 8 a.m. to 10 p.m. Central Time weekdays and on weekends from 10 a.m. to 7 p.m. at 1-844-386-9554.

Not all Checkers and Rally's restaurants and not all guests who visited the targeted restaurants were affected by this issue, according to the release. Checkers is advising guests to review their card statements.