Because this verification requires an internet handshake, offline "keygens" for version 1.2.1 are mathematically impossible to create without brute-forcing encryption–which takes years.
Be cautious of websites offering "free" activation keys or cracks for version 1.2.1. City Car Driving Enter 1.2.1 Activation Key PC
Looking for a free activation key for City Car Driving 1.2.1? Before you click on shady links, read this guide on the risks of cracks and the safe way to activate your PC simulator. City Car Driving Enter 1.2.1 Activation Key PC