Everything ok, I received a sticker with an active code. The invoice was correctly sent by mail. The system could not be activated electronically, it was necessary to have call at an automated Microsoft line. 5 minutes and Windows was activated;)
Windows Server 2008 Device CAL

- Transferable license (online activation)
- 1 license for 1 device only
- CALs (= Client Access Licenses)
- Used for accessing Windows Server 2008 R2 or older
- License with no expiration date
- License certificate
- Documentation in accordance with the EU laws (Seller's Declaration)
- Confirmation of purchase (invoice)
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Windows Server 2008 Device CAL
CALs - your access to Windows Server products
Windows Server 2008 CALs provide access to Windows Server 2008 or any of the previous versions. They give users the right to legally access a server installed with Windows Server software. Device CAL is for a single device with unlimited number of users.
Note: This is just a client access license, you can find the Windows Server 2008 programs here: Windows Server 2008 Standard or Windows Server 2008 Standard R2.