Companies that dismiss your emails without even considering them. 

The casio distributor has recalled an AC adapter (zzu10001) because it can split and expose electrical parts. 

https://www.rockshop.co.nz/bandroom/news/casio-power-adapter-product-recall-notice/

I have a very similar casio keyboard adaptor but not specifically in the recall.   However, my casio adaptor split and also exposed electrical contacts directly connected to the 230v supply. 

My casio AC adaptor has a modular pin head for different country pin layouts --You just plugin the pin head module your country. 

Like this (this is a picture of the one they are recalling)...

My adaptor failed , because plugging/unplugging from the wall socket causes the modular pin head to completely crack open, it is flimsy to say the least. Seems an incredibly dangerous design. 

So, i was not surprised when I saw the recall, thinking mine must be in the recall too. But it is not. 

I sent an email to the casio distributor, with a photo of my casio adaptor wondering if mine should have been recalled too. 

Got a fairly annoying response. Firstly, she said the pins on the recalled ZZU1001 units were not removable, when clearly they are as you can see this at this link...

http://www.dynapowerusa.com/product/6w-wall-mount-adapter-with-interchangeable-ac-plugs-zzu1001-6w/

THen, she said I should just go back to the retailer as casio do not sell removable pin adaptors so mine must be an aftermarket adaptor.    She didn't even look at this photo I sent. 

Clearly a casio adaptor that has removable pins, something that does not even exist according to her (I guess it could be counterfeit but unlikely). 

Oh well, i guess it doesn't really matter that much. There probably aren't too many around anyway.