I found out that a relative, @Akiba Schlussel, passed away, and wanted to post condolences so all of his loved ones could see it, in a similar way to congratulations for a birthday, anniversary or other milestones.
Geni either doesn't have such an avenue, or I don't know how to find it.
Please comment on this idea so the right people could see it and take the appropriate steps to add such a feature.
To Akiba's loved ones, my sincere condolence over his death, and you should find confort in each other.
You would probably have better success to get the family's attention by posting it as a family group discussion topic tagged to Akiba's profile.
What you also could have done was to post it as a family news announcement, but that is currently disabled, but will reappear soon in a better form.
I will raise the question to the Geni staff in a curator discussion and ask if they can bring back in-memorial messages to a deceased profile's guestbook in some form.
They had to take it away because so many misused this option for spamming and posting for example hateful messages to the Prophet Muhammad of Islam (PBUH) profile and linking it to anti-islamic sites.
@Bjorn P. Brox
If you had a good feature on Geni, like the in-memorial messages you mentiond, you don't eliminate it before having something else to replace it, just because some "nuts" or misguided people use it improperly.
What Geni did is punish the majority of good people for the misdeeds of the few bad ones.
The important thing though was to bring the lock of such a feature to the right people, like you, to get the ball rolling in improving Geni in a meaningful way.