Re: Is there an Expiry Date for "Declaration of Conformity" (DOC) for Medical Devices
The DoC is needed in order to place the product in the market, therefore is not "expiring", even if the product use-by or expiry date passes.
Depending on your document management policy, you can include a document version indication and a document revision date, but as part of your 13485 document handling process and will not mean that the DoC "expired".
You must have the document available (for audit/inspection by CAs etc) for 5/15 years after the last manufacture of the product, but this doesn't imply that the DoCs that you have already sent out cease to be valid after this period.