Making a declaration on the One-Call System (Guichet Unique)

These forms and information are available on the networks One-Call System (Guichet Unique) website.

How to declare your works project or works?

• Indicate the area of the future worksite on the networks One-Call System (Guichet Unique) website.  
• Read the list of network operators concerned by the project that you have indicated on the networks One-Call System (Guichet Unique).
• Fill out the necessary form for the works project (called a “DT”) or the form for the works if you intend to start them (called a “DICT”), and send them to each network operator concerned by your works, including a georeferenced plan.  
• If you are both the project manager and the works company, you can fill out a joint “DT-DICT” form.
• Send the forms by post or email to the address provided on the form.