Your must ensure that products / service / processes not conforming to requirements / plans are suitably identified (where applicable) and controlled to prevent mis-use.
There are a number of ways you could deal with these issues (forget the term non conforming product unless you actually manufacture something):
- take action to eliminate the issue (eg quarantine it)
- inform the customer
- authorise its use by way of a concession by relevant authority and where applicable the customer.
- taking action to preclude its original intended use.
Records of such problems and subsequent actions shall be maintained.