You might be able to RMA your motherboard as long you have the original invoice or sales receipt. Consumer rights laws differ in locations around the world. Start the RMA process online with ASRock online: ASRock > Support Request Form
You should be able to deal directly with ASRock in Europe.
Did your motherboard come in a factory sealed box? Do you sill have the motherboard box?
Spend some time in the library and also see if the government has a consumer rights department where you can get more information.
I've owned several Gigabyte motherboards and none of them came with separate warranty papers.