Can a Geass be removed?

[danny-roboguy.livejournal.com]

We all know that a Geass effect can be cancelled, but can a Geass itself be removed or negated without the possesor being killed or a transfer of the Code?

So far the only solution I've came up with is if Lelouch commanded another Geass user to never use his/her geass ever again. What do you guys think?

Comments

[mirkitsune.livejournal.com]

Perhaps amnesia?

Basing it on the fact that Charles erased Lelouch's memory and altered things via mindrape, perhaps all one has to do is forget about the existence of Geass? If they don't know what it is, they don't know how to use it, even if they have it.