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Receipts and invoices filed from a single chat message

Photograph a receipt or forward an invoice in Telegram. An AI agent extracts the data, files the document in Drive and updates the books in Sheets.

The n8n workflow: a Telegram trigger branches into a PDF path and a photo path, both handled by an AI agent, then Google Drive, Google Sheets and a confirmation message.
Two paths, one outcome: PDFs are parsed, photos are read by the agent, both end in Drive, Sheets and a confirmation.
Client
Installation company with field teams
Sector
Field services
Type
Automation
Services
Document AI, n8n orchestration, Google Workspace integration

Outcomes

1message to file a receipt, from any van or site
2input paths, photo and PDF, both structured by AI
0invoice fields typed by hand

Challenge

Receipts collected in vans, pockets and glove boxes. At month end the bookkeeper chased twelve people for paper, and the numbers were always a few weeks behind reality.

Approach

A Telegram bot is the only interface. A message with a PDF is parsed directly; a photo goes to an AI agent with a structured output schema that returns supplier, date, amount, VAT and category. Both paths upload the original to Google Drive, append a row to the bookkeeping sheet, and confirm back in the chat.

The agent is deliberately narrow: it extracts, it does not decide. Anything it cannot read with confidence is flagged for a person instead of guessed.

Outcome

The paper trail became a chat. Receipts are filed the moment they exist, the books are current every day, and month end stopped being a hunt.