Sorry I should have been more specific. I meant the url provided in “certificate” on the AcmeOrder object, which is downloaded via the get-as-post method.
Your endpoint still being in the system is promising to me - however I will not have the certificate serial.
In my use-case, the acme server receives the finalize command and we have possibly downloaded the certificate… however an application error causes the local copy to not be correctly saved.
To handle this I load the order url and try to download and process the certificate. It works, but I’d like to know if it is reliable.