  In this letter, we review a candidate for dark matter, known as O$f$DM, and
explain how it relates to spacetime nonlocality. This connection provides a
physical interpretation for why O$f$DM exists. Given the state of direct and
indirect searches for dark matter, O$f$DM model would be an important candidate
to consider, since it predicts all direct searches would fail to detect DM. The
model has only one free parameter and in this regard, it is highly predictive.
We review a few avenues to test this model.
