After the registration form and fee payment are completed, the Committee will not refund the registration fee under any circumstances. When there is a need to change personal information or transfer the competing rights to a 3rd party, participants need to comply with the regulations on personal information change or transfer announced by the Organizing Committee for each marathon.

All modification requests should go through the Organizing Committee via email: congress@dhavietnam.vn. The Organizing Committee will provide support as soon as possible after receiving the participant's request. Any distance change is accepted when the request is made before the deadline, which is the race date.

The participant will have to pay the difference of the registration fee, in case the new registration has a higher fee than that of the original one, and the balance will not be refunded if the new registration fee is lower.

For further details, please refer to its Terms and Conditions.