We have been using Let's Encrypt for two years, however, we have moved our solution to AWS Amplify.
The new certificate is issued by AWS and it also works well.
I want to know what I should do for the old let's encrypt certificate.
I just received the reminder email saying it will expire.
Is there anything I need to do? The old server has been destroyed, so no way to retrieve old certificate files.
Hi @qkou1989, and welcome to the LE community forum 
Generally, you would delete the certs from the ACME client and uninstall the client if no longer needed.
But since:
That is not even possible.
But fear not, it will all work its' way out (just the same).
You can just ignore the renewal reminders.
Thank you for your quick answer! I can sleep better now.
I should consider it more carefully and ask questions first when moving to AWS Amplify.
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