CHICAGO (WLS) -- Sunday is the last day customers can pay for food at Portillo's drive-thru locations with cash.
Starting Monday, all Portillo's drive-thru restaurants will go cashless.
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The company said the change is being done for worker's safety, since several drive-thru workers have been robbed or threatened while on the job.
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Portillo's said the change is expected to shorten drive-through times for customers.