Costco is cracking down on nonmembers entering its warehouses.

The big-box retailer is installing card scanners at store entrances nationwide, several of which were spotted recently in Tustin, Sherman Oaks, San Dimas and Santa Clarita.

The company on its online customer service page said the scanners would appear over the coming months.

“Once deployed, prior to entering, all members must scan their physical or digital membership card by placing the barcode or QR Code against the scanner,” Costco stated.

In a “we see you” nod to guests entering Costco warehouses while waving someone else’s membership card at the door attendant, the company said it will be matching photos to membership cards. So, if your Costco card or credit card doesn’t have a photo (or that photo is old, smeared or illegible), expect to be asked to show a photo ID as well.

Costco has been attempting to halt nonmember usage in other ways. In April, customers reported some food courts were requiring membership cards for purchases.

The company’s chief financial officer told Axios in March that policy change was meant for locations with outdoor food courts.

The door scanners come amid several other changes at Costco warehouses.

The retailer in early July said it was raising membership fees for the first time in seven years. The new fees, taking effect Sept. 1, will raise the price of Costco’s Gold Star membership to $65 from $60 annually. The Executive membership is rising to $130 from $120.

Costco also replaced its popular churro with a 750-calorie chocolate chip cookie, and it switched the rotisserie chicken container with a plastic bag.

The changes didn’t go smoothly with all customers, some of whom expressed their ire on social media.

“First Costco puts rotisserie chickens hidden in a leaky plastic bag,” Long Beach Daddy commented on X, formerly Twitter. “Now I have to get scanned before entering the store? What’s next? $3 hot dogs and paying 25 cents to borrow a shopping cart?”

Another X user named Green@masterofstink was a bit brazen when they cheered “less leeches in Costco.”

Astute shoppers will note that Costco does allow nonmembers in its US stores to use its pharmacy and to buy liquor. California law prohibits membership clubs from excluding the public from alcohol sales, meaning customers can walk in and buy just booze without a Costco card.

Costco, which says it has 128 million cardholders in 73 million households, reports its earnings in September. Analysts expect the retailer to show growth of 3% or more.