The PCI Security Standards Council has released an update to its guidance for merchants on protecting against card skimming attacks in POS environments. PCI Security Standards currently contain a number of requirements and recommendations to guard against skimming. In addition, the Council has introduced an overview document for merchants, containing a “deep dive” into skimming with examples, best practices, and tools to thwart its use.
Read more here - https://www.pcisecuritystandards.org/documents/Skimming_Prevention_At-a-Glance_Sept2014.pdf