If you have been arrested abroad following the commission of the offence, your identity has been identified and the local sanctions are applicable to you (fine, suspension of driving licence, imprisonment, etc.) .
For less serious offences, the officer will force you to pay on the spot to avoid the fine going unpaid.
In the absence of an arrest, do we have to pay the notice of violation deposited in your mailbox?
In practice, the foreign State has access to the registration files allowing it to send the report to the owner of the vehicle - only for speeding, failure to wear a seat belt, crossing a red light drunk driving, driving after drug use, failure to wear a helmet, driving on a prohibited road, and illegal use of a mobile phone.
A third State has no power of coercion in France over a national residing in France for an offense even committed on its territory.
Thus, any threatening letter on the official letterhead of a foreign administration, a French collection company or even a bailiff, is generally assimilated to a simple intimidation to pay the PV.
Indeed, only the sanctions coming under a final decision and transcribed by a judicial decision of a French court are binding on the user.
In any case, you will never lose points for an offense committed abroad.
However, in case of return on the spot, it is not impossible that the local authorities impose the payment of the slate on you.