If you need to exchange a MagSafe adapter

Last week, we told you about an Apple TechNote in which we learned that Apple would allow for the exchange of bare MagSafe adapters under certain conditions.
It had been indicated that it was not necessary to bring the computer. However, a reader reminded us that in order to open an exchange file, they will need the serial number of your machine. So, we recommend that you bring your computer, its receipt, or at least write down its serial number before leaving.
The same applies to all purchases of spare parts not requiring exchange, such as casing, trackpads, or even keyboards.