EUOSHA/2021/OP/F/SE/0142  If required for the purposes of room reservation, the contractor must be able to make all the necessary  provisions (such as guarantees or advance payment) to secure the reservation.  The contractor must settle the hotel bill for the participants, moderators and speakers, excluding the  staff of European institutions and self-paying participants.  The contractor will take all necessary measures to ensure that any cancellations are settled in the best  interests of EU-OSHA. Any additional costs arising from negligence on the part of the contractor will  be borne by the contractor.  Based on the request for services and the information provided by EU-OSHA, the contractor will be  responsible for managing the payment of any allowances that EU-OSHA may decide to give to  attendees.  The tenderer must meet the following minimum requirements covering all the services described above:  Allowance  2.3.15 Minimum requirements for the organisation of corporate events • provide an approach for assisting participants with bookings, re-bookings and/or cancellations  of travel and accommodation requests.  • provide a methodology for the management of travel and accommodation arrangements of  event participants;  • provide a methodology for the organisation of interactive online and hybrid events;  • present the different phases of organising an event and the mechanisms the contractor has  to ensure a successful outcome;  • provide an approach for organising and managing successful events of the typology explained  above, including case studies based on previous projects;  37 