Key rules, reservation periods, and trademark checks.

In Estonia your company name must be written in the Latin alphabet, avoid unusual symbols, be unique in the Commercial Register, and not duplicate or infringe any registered trademark. Because an Estonian company is also an EU company, it is wise to run an EU-wide trademark search to ensure the name is not already protected elsewhere in the single market.

A legal entity may reserve one business name for six months at a time, specifying both the intended legal form (e.g. OÜ, AS, MTÜ) and field of activity. Only one active reservation is permitted per entity, and the name can be used solely for the chosen form and activity. For valid reasons the reservation can be extended once for a further three months, provided the request is filed no later than five working days before the original reservation expires.