Document generator and digital mail merge

A document generator combines a contract template with variable data (name, SIREN, amount, date, etc.) to automatically produce a PDF ready for signature. Common technologies are: Word/DOCX template engines (Carbone.io, Docxtemplater), LaTeX, HTML-to-PDF (Puppeteer/headless Chrome) and Adobe PDF Services API. The advantage of digital mail merge over paper mail merge is direct sending to the signature workflow without printing: the generated document is injected into the signature envelope via the REST API, signature fields are positioned by coordinates or HTML tags, and the cycle closes in seconds. The main risk is layout divergence between local DOCX rendering and server rendering — a suite of visual regression tests (PNG capture + diff) is recommended.