The management of the sponsors is very advanced, and includes both private sponsors, who issues a VAT receipt, and sponsors public free of charge to whom.
The services sponsored are customizable. For each sponsor you can specify if you pay the registration, hotel or any additional services.

The choice of the sponsor may be left to the participant, or can be controlled by a specific "password" that can be provide participants sponsored.

In voucher shall be clearly stated what services are sponsored and which  not.