  AT 2020mot is a typical UV/optical tidal disruption event (TDE) with no radio
or X-ray signatures in a quiescent host. We find an i-band excess and
re-brightening along the decline of the light curve which could be due to two
consecutive dust echoes from a TDE. We model our observations following van
Velzen et al. (2016) and find that the near-infrared light curve can be
explained by concentric rings of thin dust within $\sim$0.1 parsecs of a 6e6
M$_{\odot}$ supermassive black hole (SMBH), among the smallest scales at which
dust has been inferred near SMBHs. We find dust covering factors of order fc
$\leq$ 2%, much lower than found for dusty tori of active galactic nuclei.
These results highlight the potential of TDEs for uncovering the environments
around black holes when including near-infrared observations in high-cadence
transient studies.
