Collect PPWR Packaging Declarations via n8n CSV & Forms

Automate PPWR packaging declaration collection with an n8n CSV + Forms flow

Collect supplier PPWR (Packaging & Packaging Waste Regulation) packaging declarations at scale: upload a supplier CSV, send request emails via n8n, capture each submission through an n8n Form (with PDF attachment), extract key fields, run a deterministic checklist, and automatically email either a completion confirmation or a “what’s missing” notice.

What this workflow does

• Upload suppliers & items via CSV in an n8n Form. The workflow parses the CSV, validates required columns and email addresses.
• Reject invalid/duplicate rows and keep a rejection report by line number.
• Send targeted declaration requests: for each valid row, the workflow builds an email including the supplier’s item reference and an n8n Supplier declaration form link, then sends it using SMTP.
• Process supplier submissions: when a supplier submits the form with their details and a PDF attachment, the workflow extracts the text from the PDF and uses a LangChain agent to report key fields (e.g., signatory, date, material, and PFAS/BPA statements).
• Run a deterministic checklist: no “pass/fail” is generated by an unstable model; the same submission produces the same answer next quarter, and swapping the chat model cannot change the verdict.
• Notify results automatically:
  • If blocker checks pass: email a completion confirmation.
  • If anything is missing: email a gap notice with outstanding items and the same form link for resubmission, plus an on-screen completion message.

Use cases

• Buying teams requesting PPWR packaging declarations from multiple suppliers using one standardized intake process.
• Automation engineers needing an auditable workflow that consistently extracts key PPWR-related fields from attached PDFs.
• SaaS operators managing supplier compliance collection across recurring procurement cycles.

Technical details

• SMTP email sending for the two email steps (request + confirmation/gap notice)
• n8n Form for CSV upload and supplier submissions (PDF attachment included)
• Code for CSV parsing/validation and rejection reporting by line number
• LangChain agent to extract key fields from the submitted PDF
• Workflow logic nodes: if, set, plus supporting nodes such as sticky note

Setup: Add an SMTP credential for the two email steps and set the sender address in Configuration values.