Create and send Pennylane invoices from webhook data with Slack and Gmail alerts

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1. Workflow Overview

Who is this for SMEs and freelancers using Pennylane (the leading French accounting platform) who want to automate invoice creation from their CRM, forms, or any business tool. What it does This wo...

Best for

Invoice Processing automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.stickynote, n8n-nodes-base.webhook, n8n-nodes-base.code, n8n-nodes-base.httprequest, n8n-nodes-base.if, n8n-nodes-base.set, n8n-nodes-base.slack, n8n-nodes-base.wait

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Gauthier Huguenin.

Original n8n.io source

1.1 Workflow description

Title: Create and send Pennylane invoices from webhook data with Slack and Gmail alerts
Workflow name: Create and send Pennylane invoices from webhook data with Slack and Gmail alerts

Who is this for

SMEs and freelancers using Pennylane (the leading French accounting platform) who want to automate invoice creation from their CRM, forms, or any business tool.

What it does

This workflow receives deal or order data via a POST webhook, searches for the customer in Pennylane by email (or creates one if not found), generates a customer invoice with line items and VAT, optionally sends it by email through Pennylane, and notifies your team via Slack and/or Gmail with an HTML-formatted summary.

How to set up

Import this workflow into n8n
Create a Header Auth credential with name Authorization and value Bearer <YOUR_PENNYLANE_TOKEN>
Select your Slack channel in the SL Send Notification node
(Optional) Connect your Gmail credential for HTML email notifications
Configure invoice numbering in your Pennylane settings (required for finalized invoices)
Send a test POST request to the webhook URL with a sample payload

Requirements

Pennylane account with API access (Essentiel plan or higher)
Pennylane API token with scopes: customer_invoices:all, customers:all
(Optional) Slack workspace for team notifications
(Optional) Gmail OAuth for email notifications

How to customize

Set draft: true in the Code Build Invoice Payload node to create draft invoices for manual review before finalizing
Replace Slack/Gmail with Telegram or any other notification channel
See example payloads and CRM mappings (Pipedrive, Sellsy, Axonaut) in the GitHub repo: https://github.com/Gauthier-Huguenin/n8n-pennylane-auto-invoicing

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 2 - WH Receive Invoice Data

Type / Role: n8n-nodes-base.webhook - webhook
Config choices: Version 2.1

Block 3 - Code Validate Payload

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 4 - PL Search Customer

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.4

Block 5 - IF Customer Exists

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.3

Block 6 - PL Create Customer

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.4

Block 7 - Set Customer ID

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 8 - PL Create Invoice

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.4

Block 9 - Code Build Invoice Payload

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 10 - IF Send Email

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.3

Block 11 - Code Build Notification

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 12 - SL Send Notification

Type / Role: n8n-nodes-base.slack - slack
Config choices: Version 2.4

Block 13 - Set Output Response

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 14 - Wait PDF Generation

Type / Role: n8n-nodes-base.wait - wait
Config choices: Version 1.1

Block 15 - PL Send Invoice Email

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.4

Block 16 - GM Send Notification

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2.2

Block 17 - IF Has Notification Email

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.3

Block 18 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 19 - Sticky Note2

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 20 - Sticky Note3

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 21 - Sticky Note4

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 22 - Sticky Note5

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 23 - Sticky Note6

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 24 - Sticky Note7

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

3. Summary Table

Workflow	Create and send Pennylane invoices from webhook data with Slack and Gmail alerts
Complexity	advanced
Nodes	24
Categories	Invoice Processing
Author	Gauthier Huguenin
Published	21 Apr 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/15186/15186.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Invoice Processing workflows

Frequently asked questions

What does Create and send Pennylane invoices from webhook data with Slack and Gmail alerts do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Invoice Processing use case.

Gauthier Huguenin

3 workflows

Nodes

n8n-nodes-base.stickynote n8n-nodes-base.webhook n8n-nodes-base.code n8n-nodes-base.httprequest n8n-nodes-base.if n8n-nodes-base.set n8n-nodes-base.slack n8n-nodes-base.wait

Complexity

advanced

Published 21 Apr 2026

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/15186/15186.json

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Create and send Pennylane invoices from webhook data with Slack and Gmail alerts

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Who is this for

What it does

How to set up

Requirements

How to customize

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Sticky Note

Block 2 - WH Receive Invoice Data

Block 3 - Code Validate Payload

Block 4 - PL Search Customer

Block 5 - IF Customer Exists

Block 6 - PL Create Customer

Block 7 - Set Customer ID

Block 8 - PL Create Invoice

Block 9 - Code Build Invoice Payload

Block 10 - IF Send Email

Block 11 - Code Build Notification

Block 12 - SL Send Notification

Block 13 - Set Output Response

Block 14 - Wait PDF Generation

Block 15 - PL Send Invoice Email

Block 16 - GM Send Notification

Block 17 - IF Has Notification Email

Block 18 - Sticky Note1

Block 19 - Sticky Note2

Block 20 - Sticky Note3

Block 21 - Sticky Note4

Block 22 - Sticky Note5

Block 23 - Sticky Note6

Block 24 - Sticky Note7

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions