The best replacement for cvv2 is cvc2.

The best alternatives to cvv2 are rated as following:
★★★★★  cvc2
★★★  cvv
★★★  cvc
★★  cid
  ccv

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Speaking about cvv2, one probably shouldn't forget about credit card generator.

Other search terms related to cvv2 and their ratings are:
★★★★★ credit card generator
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