Internal audit requirements

If you check this article - List of mandatory documents required by ISO 9001:2015 - https://advisera.com/9001academy/knowledgebase/list-of-mandatory-documents-required-by-iso-90012015/ - you can see that the only mandatory records required by ISO 9001:2015 are evidence that the audit program is being implemented along with the audit results. As audit results, you can have audit reports, evidence of corrections, or corrective actions taken.

You can find more information in the following links:

• Major vs. minor nonconformities in the certification audit - https://advisera.com/27001academy/blog/2014/06/02/major-vs-minor-nonconformities-in-the-certification-audit/
• Free webinar on-demand - How to perform an ISO 9001:2015 internal audit - https://advisera.com/9001academy/webinar/how-to-perform-an-iso-9001-2015-internal-audit-free-webinar-on-demand/ (includes a slide about the follow-up)
• You can enroll for free in this course - ISO 9001:2015 Internal Auditor Course: https://advisera.com/training/iso-9001-internal-auditor-course/
• Book - ISO internal audit: A plain English guide: https://advisera.com/books/iso-internal-audit-plain-english-guide/