Using scratch paper

Answer
Yes, there is no problem as long as the forms are legible and can be stored for the planned period without loss of information. On a personal note, I remember starting to work in a multinational company in 1990 where they had the practice of re-using paper sheets for invoices and other documents.

The following material will provide you more information about record control:
New approach to document and record control in ISO 9001:2015 - https://advisera.com/9001academy/blog/2015/06/30/new-approach-to-document-and-record-control-in-iso-90012015/
- Enroll for free course - ISO 9001:2015 Foundations Course - https://advisera.com/training/iso-9001-foundations-course/
- book – Discover ISO 9001:2015 Through Practical Examples – https://advisera.com/books/discover-iso-9001-2015-through-practical-examples/