My brother passed away last week. Has over 200K miles in his DL account. Family would like to use them if possible.

Is there any way to transfer his miles to my account so I can obtain award tickets for my family?

If not, is there any other way we can recover these miles? My family feels that it would be a shame for these miles to just 'disappear' due to his passing.

Any thoughts, ideas would be greatly appreciated. Thank you in advance.