IF you need to end an internet contract or maybe write a letter of complaint about a service, then more than 100 letter templates are available on the Institut national de la consommation website.
The letters will help you resolve disputes and are grouped by topics such as insurance, banking, internet and money, they are free to copy and paste into whatever office software you use or just to email direct.
You can narrow down your search by clicking on the options in the left hand column, there are tick boxes for different services such as banking, insurance and internet services.
It is also possible to get sample letters in French for business purposes or if you are involved in an association.
Each letter provides an explanation of how it can be used, then you need to update name and date fields and it is usually wise to send correspondence by registered post, or lettre recommandée.