---
title: Auto-Entrepreneur Activity Change & SIRET Modification Form | Paperform
description: Official French form for auto-entrepreneurs to declare activity changes, update APE codes, and notify URSSAF. Streamline SIRET modifications and maintain compliance with French micro-enterprise regulations.
url: "https://paperform.co/templates/auto-entrepreneur-activity-change-siret-modification-form"
type: static
generatedAt: "2026-03-28T00:43:05.965Z"
---

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### Simplify Your Auto-Entrepreneur Activity Changes with Paperform

Changing your auto-entrepreneur activity in France involves navigating complex regulatory requirements across multiple agencies—URSSAF, INSEE, and the French tax administration. This **Auto-Entrepreneur Activity Change & SIRET Modification Form** streamlines the entire process, helping independent contractors, freelancers, and micro-entrepreneurs notify authorities of business changes in one organised, compliant submission.

#### Why French Auto-Entrepreneurs Need This Form

Whether you're expanding your services, pivoting to a new sector, or updating your APE code (Activité Principale Exercée) to reflect your actual work, proper documentation is essential. This template helps you:

 - **Declare activity modifications** to URSSAF and other regulatory bodies
 - **Update your SIRET and APE code** with accurate business information
 - **Maintain compliance** with French micro-enterprise regulations
 - **Create an audit trail** of all business changes for tax and legal purposes
 - **Avoid penalties** from incorrect or delayed notifications

Designed specifically for the French regulatory environment, this form collects all necessary information including your SIRET number, current and new APE codes, revenue details, and justification for the activity change.

#### Built for French SMBs and Independent Professionals

This template serves consultants, artisans, commerçants, and liberal professions operating under the auto-entrepreneur (micro-entrepreneur) regime. Whether you're a web developer adding design services, a consultant expanding into coaching, or a artisan diversifying your craft offerings, this form ensures your administrative obligations are met professionally.

Paperform's conditional logic adapts the form based on your specific situation—whether you're adding a secondary activity, changing your primary activity entirely, or simply correcting an incorrectly assigned APE code. The multi-page structure keeps complex regulatory information organised and easy to complete.

#### Automate Your French Business Admin with Stepper

Once submitted, connect this form to [Stepper](https://stepper.io) to automate your follow-up workflows. Route notifications to your accountant, create reminder tasks for URSSAF filing deadlines, update your business records in Airtable or Notion, and maintain a complete timeline of all regulatory changes. Stepper's AI-native automation means your business admin runs smoothly while you focus on serving clients.

For French entrepreneurs who need professional, compliant forms without the complexity of traditional administrative paperwork, Paperform delivers a solution that respects both regulatory requirements and your time. Get started with this template and handle your activity changes with confidence.
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