UPDATE NOTE: This is an older recall, going back to 2016. If you have already participated in the recall then further action is not necessary.
“Apple has determined that, in very rare cases, the two prong Apple AC wall plug adapters designed for use in Continental Europe, Australia, New Zealand, Korea, Argentina and Brazil may break and create a risk of electrical shock if touched. These wall plug adapters shipped from 2003 to 2015 with Mac and certain iOS devices, and were also included in the Apple World Travel Adapter Kit.”
“This recall covers the two prong plug portion of the Apple AC power supply (wall plug adapters) designed for use in Continental Europe, Australia, New Zealand, Argentina, South Korea and Brazil.”
- Source 3: https://www.afr.com/technology/why-you-must-not-ignore-apple-power-adapter-recall-and-know-your-rights-20160205-gmn6be
“Apple’s website advises that in very rare cases, the two prong wall plugs designed for continental Europe, Australia, New Zealand, Korea, Argentina and Brazil can break and create a shock hazard. So the company will exchange the part at no charge. “