EMA Guideline: Guideline on the content, management and archiving of TMF_6Dec2018 section 5 has provided clear instructions on this.
For the follow up question, my personal thinking is that it could be acceptable as long as the process is “validated”. For example, set a series of Criteria for risk-based QC:
1. Documents that are essential per ICH GCP 8 should be 100% QCed
2. A certain percentage of other non-essential documents to be verified. If errors, then should expand the scope/volume of documents to be checked.