  We investigate the effects on sub-TeV resonant leptogenesis of Primordial
Black Holes with masses from $10^6$ to $\sim 10^9$ g. The latter might dominate
the energy content of the Universe altering its evolution and, eventually,
diluting the final baryon asymmetry. We find that, depending on the mass and
abundance of Primordial Black Holes, the parameter space of sub-TeV resonant
leptogenesis shrinks towards higher Right-Handed Neutrino masses and smaller
active-sterile mixing. Remarkably, this translates into important implications
for the experimental searches of heavy neutral leptons. Conversely, we
demonstrate that a possible future detection of sub-TeV heavy neutral leptons
would disfavour regions of the parameter space of Primordial Black Holes
currently allowed.
