Well, I can’t remember that the IMEI was necessary. The support page for a broken regular cover reads as follows:
We want to help you further
We would like to look further into your case and determine whether it should be covered by the warranty or not.
Please make sure we have your correct shipping address by checking your account.
Once your address is correct please send us a support request below stating the following:
Subject: "Broken back cover"
Description: "My back cover is broken. I confirm that my shipping address is correct. Please help me further "
attach a picture of your back cover;
tell us which back cover is your favourite among:
Slim Indigo Blue
Slim Coral Red
Check them out on our online store and choose the one you prefer!
Send us a support request
There is a hyperlink to the support request; and you don’t have to enter any IMEI or serial number as well.
So give it a try.
-> Back cover > regular > my cover is broken