Guardian Security Suite by TSYS

Since 2010, when Total System Services, Inc. (also known as TSYS) purchased a majority stake in First National Bank of Omaha’s merchant acquisition business, the company has been a significant player in the credit card payment processing industry. It’s one of the largest processors in the world, and offers a full range of services.

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Address Verification Service (AVS)

Address Verification Service (often referred to as AVS and sometimes Address Validation) is an anti-fraud tool offered by credit card processing companies. The tool works by comparing name and address information given by the person claiming to own the credit card to the name and address on file with the credit card company.

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