adaptor serial number
how about adaptor? can i check the serial number?
No, not to my knowledge.
But if you bought it from Apple official channels (Apple online shop, Apple phisycal store, Apple Authorized Reseller) it is genuine for sure.
If it is not an Apple 20W charger, check that it is MFI (Made For Iphone) certified. Do not use other chargers.
Regards
Giulio