{"product_id":"n8n-workflow-issue-cohort-completion-certificates-pdfmill-gmail-drive","title":"n8n Workflow: Issue Cohort Completion Certificates (PDFmill + Gmail + Drive)","description":"\u003ch3\u003eIssue cohort completion certificates at scale—automatically—and archive them instantly\u003c\/h3\u003e\n\u003cp\u003eThis n8n workflow issues personalized completion certificates for an entire cohort from a single validated webhook. It renders each PDF with \u003cstrong\u003epdfmill\u003c\/strong\u003e, sends it via \u003cstrong\u003eGmail\u003c\/strong\u003e, and archives the same certificate binary to \u003cstrong\u003eGoogle Drive\u003c\/strong\u003e—then returns a clean issued count once both delivery steps succeed.\u003c\/p\u003e\n\n\u003ch3\u003eWhat this workflow does\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReceives one POST webhook\u003c\/strong\u003e containing the program, organization, issuer, completion date, and a complete \u003cem\u003eattendees\u003c\/em\u003e array.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eValidates every cohort and attendee field\u003c\/strong\u003e, including attendee names, a single mailbox address per recipient, positive hours, and an optional completion-date override—before any fan-out occurs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrevents partial delivery\u003c\/strong\u003e: if the roster is empty or any field is malformed, it returns a single clear \u003cstrong\u003e400 response\u003c\/strong\u003e so no invalid cohort is partially emailed.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCreates per-attendee items\u003c\/strong\u003e and assigns an execution-scoped certificate number that cannot overlap with adjacent n8n executions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRenders branded PDFs\u003c\/strong\u003e with \u003cstrong\u003epdfmill\u003c\/strong\u003e for each attendee and exposes the result in the data binary property.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDelivers to Gmail and archives to Drive\u003c\/strong\u003e using the same PDF binary, waits for both branches, then returns the program, organization, and issued count.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSend completion certificates to graduating cohorts from a SaaS course platform webhook.\u003c\/li\u003e\n  \u003cli\u003eAutomate certificate issuance for bootcamps, training programs, or internal enablement programs.\u003c\/li\u003e\n  \u003cli\u003eCentralize certificate archiving in Google Drive for audit-ready records.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNodes \/ integrations\u003c\/strong\u003e: \u003cstrong\u003ewebhook\u003c\/strong\u003e, \u003cstrong\u003eif\u003c\/strong\u003e, \u003cstrong\u003ecode\u003c\/strong\u003e, \u003cstrong\u003epdfmill\u003c\/strong\u003e, \u003cstrong\u003egmail\u003c\/strong\u003e, \u003cstrong\u003emerge\u003c\/strong\u003e, \u003cstrong\u003eGoogle Drive\u003c\/strong\u003e, plus supporting workflow notes (e.g., sticky note).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSetup\u003c\/strong\u003e: install the verified \u003cstrong\u003epdfmill\u003c\/strong\u003e node; add \u003cstrong\u003epdfmill\u003c\/strong\u003e, \u003cstrong\u003eGmail\u003c\/strong\u003e, and \u003cstrong\u003eGoogle Drive\u003c\/strong\u003e credentials; select the Drive folder to archive certificates.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWebhook contract\u003c\/strong\u003e: the cohort-completed endpoint expects the documented program\/organization\/issuer\/completion date and attendee fields.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"N8N Commerce","offers":[{"title":"Default Title","offer_id":45899953537203,"sku":"N8N-18709","price":61.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6279\/6723\/files\/i2L15KnEo3iguB_qx3hCG_ATN2Up09.png?v=1787735351","url":"https:\/\/buyflowscripts.com\/products\/n8n-workflow-issue-cohort-completion-certificates-pdfmill-gmail-drive","provider":"N8N Commerce","version":"1.0","type":"link"}