A complete workflow to create, send, and verify digital certificates fully automated with n8n.Perfect for courses, events, onboarding, internal training, or product education. Visit my website for the: full deploy guide See my Templates on Github: paoloronco/n8n-templates ) Example-certificate ✔ 1. Certificate Generation When a POST webhook request arrives, the workflow: reads name, surname, course, and email generates a unique Certification ID saves everything in the Data Table ✔ 2. Data Storage Every issued certificate is recorded in an n8n Data Table containing: Name Surname CertificationID This creates a permanent, searchable certificate registry. ✔ 3. PDF Creation Uses PDF Generator API to create a professional PDF certificate from an HTML template: fully customizable (layout, colors, branding) includes candidate data, course, ID, and date ✔ 4. Email Delivery The workflow automatically sends the certificate to the recipient using Gmail OAuth2 with: a predefined subject the PDF attached a customizable message ✔ 5. Verification System A public endpoint /certificationscheck allows: validation of Certification IDs returning the candidate’s name and surname if valid responding with ok: true/false ✔ 6. Included Mini Verification Website A ready-to-use HTML file allows users to: enter a Certification ID verify its authenticity view name and surname if the certificate exists Fully customizable (CSS, texts, branding). 🛠 Requirements Before using this workflow, you must have: n8n Data Table with ID fields: Name (string) Surname (string) CertificationID (string) PDF Generator API account Credentials set in n8n as pdfGeneratorApi . Gmail OAuth2 credentials Configured in n8n as gmailOAuth2 . Ability to call HTTP POST endpoints from your website, backend, forms, etc. 🚀 Installation 1. Import workflow In n8n: Go to Workflows → Import Paste the JSON provided in this repository 2. Configure Data Table Update the following nodes to point to your Data Table: Insert_Certificaton Find_Certification_By_ID Find_Certification_By_ID1 Make sure the Data Table has the fields: Field Type Name string Surname string CertificationID string 3. Configure Credentials In the workflow: Node Generate_PDF → set PDF Generator API credentials Node Email_Certification → set Gmail OAuth2 credentials 4. Activate Workflow Click Activate in n8n. 🔧 How the Workflow Works 🧩 1. Webhook /certifications Receives candidate data and triggers the workflow. POST https://YOUR-N8N-DOMAIN.com/webhook/certification Headers: name: John surname: Doe course: email: [email protected] 🧩 2. Unique ID Generation A Code node creates a random alphanumeric ID.If it already exists, a new one is generated. 🧩 3. Data Table Insert Stores the certificate data for future lookup. 🧩 4. PDF Generation Builds a PDF from the (fully editable) HTML template. 🧩 5. Email Sending Delivers the certificate to the candidate. 🔍 Certificate Verification ( /certificationscheck ) API Behavior Send a POST request https://YOUR-N8N-DOMAIN.com/webhook/certificationcheck with header id: CERTIFICATION-ID . Valid ID: { "ok": "true", "name": "John", "surname": "Doe" } Invalid ID: { "ok": "false" } This request can be made manually (from tools like Postman, cURL, or your backend), or automatically through the HTML verification page included in the GitHub repository (the Cerification_Check.html template) found in your project files