What documentation do I need to be able to send to Estonia?
As we are sure that you want your trip to be planned as agile and easy as possible, don't worry about the documentation.
Most travellers choose to show their ID card as the document that certifies them to send their luggage to Estonia. Requirement? Only that it has not expired.
But if you do not have your ID card for any reason, don't worry. You can also show your Passport!