Official contacts

Tel. +358 29 503 0000
The charge for calling our numbers beginning with 29 is your local network charge or the basic mobile phone charge of your mobile operator subscription.

Management and contact persons

E-mail 
- Official registry address: gtk_gtk.fi
- Inquiries: info_gtk.fi
- Personal mail: forename.surname_gtk.fi

Business ID: 0244680-7

GTK's headquarters are based in Espoo, Finland.

Offices
Espoo
P.O. Box 96
(Betonimiehenkuja 4)
FI-02151 Espoo
Finland
Fax +358 29 503 2901
Map 
 		 Mineral Processing Laboratory 
Tutkijankatu 1
FI-83500 Outokumpu
Finland
Fax +358 13 557 557
Map
Kuopio
P.O. Box 1237
(Neulaniementie 5)
FI-70211 Kuopio
Fax +358 29 503 3901
Map		 National Drill Core Archives
Mustinsuontie 159
FI-12600 Läyliäinen
Finland
Fax +358 19 445 069
Map
Rovaniemi
P.O. Box 77
(Lähteentie 2)
FI-96101 Rovaniemi
Finland
Fax +358 29 503 4991
Map		  
Kokkola
P.O. Box 97
(Vaasantie 6)
FI 67101 Kokkola
Finland
Fax +358 29 503 5209
Map
 
 

 

GTK invoice address

Electronic invoices
E-billing address/party identification number: 003702446807
Operator ID (Itella Information Oy): 003710948874

Business ID: 0244680-7
VAT number: FI02446807

Only electronic invoices accepted
If you do not yet have an e-billing system, you can use the Finnish Government’s e-billing service Supplier Portal to produce and send electronic invoices. The service is currently offered free of charge. To find out more about the service and to create an account, please visit Government E-Invoicing Website.