Thanks for providing this information, by the sounds of this the Steam account you are purchasing this content on is linked to your brothers Ubisoft account which is causing this issue. If possible could you confirm whether you share this Steam account with your brother or each have access to your own.?
In the meantime, to request this transfer we would require you to contact us directly with an image showing the proof of purchase for this product along with the details of both Ubisoft accounts you are wishing to make this transfer between. Once we have this information we would be able to verify your request and check to see whether this would be possible.
The fastest way to get this resolved would be to contact us directly through our "... Read more
In the meantime, to request this transfer we would require you to contact us directly with an image showing the proof of purchase for this product along with the details of both Ubisoft accounts you are wishing to make this transfer between. Once we have this information we would be able to verify your request and check to see whether this would be possible.
The fastest way to get this resolved would be to contact us directly through our "... Read more