Apple requires that you use Apple-made or Apple-certified charger and reserves the right to void warranty if you do not.
> Fast charging works when you use an Apple USB-C to Lightning cable and one of these adapters:
> Apple 18W, 20W,2 29W, 30W, 35W, 61W, 67W, 87W, or 96W, or 140W USB-C Power Adapter
> A comparable third-party USB-C power adapter that supports USB Power Delivery (USB-PD)
I've found some references to potentially voiding the warranty by using a non-MFI cable. But again, the cable is included with the phone.
Note that the same clause is present in the brazillian warranty.
This one? It doesn't say the charger needs to be certified, only that it needs to meet specifications, which can be found in the tech specs for each product.
The iPhone 14's specs [0] don't seem to mention any requirement for certifications.
I'm not saying you're necessarily wrong but so far I haven't found anything to support your claim. Could you please point me to where I can find the need for a certification?
A sibling comment posted a link to a page talking about PD but that seems to be only a requirement for fast charging, not a hard requirement.