You should be able to find it in your inbox by searching for the words: order confirmation, reMarkable, or sales documentation. The order confirmation email might end up in your spam folder — so be sure to check there too. If you used PayPal when checking out the order confirmation will be sent to the email address connected to your PayPal account.
Due to the General Data Protection Regulation (GDPR) we're not allowed to save the order confirmation email in our systems for longer than 30 days. If you placed your order more than 30 days ago we are unfortunately not able to resend your order confirmation. However, the receipt from our payment partners should be sufficient as it holds your order ID.
Note: there may be some delay between when your order is submitted and the time you receive your order confirmation email.