Job work Debit note issue

A GST taxpayer in the garments sector received a debit note with GST from a recipient who supplied thread for job work. The taxpayer is seeking clarification on how to treat this in GSTR 1, whether they can claim Input Tax Credit (ITC), and if a sales invoice is also required. The discussion also raises questions about whether the document should be a debit note or a delivery challan under Rule 55 of the CGST Rules 2017, especially concerning the recipient issuing a debit note for consumed thread.