When you import products to EU (eg. to our Czech warehouse) you will need EORI number. This can be obtained online:
https://www.celnisprava.cz/cz/aplikace/Stranky/eoriadhoc.aspx
Have EORI number is mandatory for every subject who import goods to EU from other countries (outside EU). This is valid for export outside EU as well.
You might check any EORI online here:
http://ec.europa.eu/taxation_customs/dds2/eos/eori_validation.jsp?Lang=en
We strongly recommend use DHL for import to CZ, as they have pretty good service which help you import your parcels without any problem. All can be done from your home, online.