Siblings who are asked to donate haematopoietic stem cells are in a vulnerable position. Potential sibling donors must be fully informed, orally and in writing, and be able to provide informed consent without pressure or coercion.1, 2, 3 To achieve this, one must focus on the management of confidentiality in terms of donor volunteer status and strive to protect the integrity of the sibling.4, 5 At our centre we decided to improve this aspect in the care of potential sibling donors, enabling an early termination of the process for those not willing or unable to donate. We also wanted to improve the information to, and the follow-up of sibling donors.