  We describe the late spectral variability and flux evolution of TDF Sw
J1644+57, a Tidal Disruption Flare which left the typical potential trend
proportional to $t^{-5/3}$ in 2012, maintaining a quiescent flux until
nowadays. Sixteen X-ray observations of ESA satellite \emph{XMM-Newton} have
been used in this study, including the one performed on 17$^{\rm th}$July,
2013. A search for optical emission in BOOTES/CASANDRA database has been
performed too. Late X-ray fluxes show that the source flux decline does not
follow the expected TDF trend at the time of the last \emph{XMM-Newton}
observation. Moreover, the spectra fitting parameters, in particular the
neutral hydrogen column density, N$_{\rm H}$, and the power-law index,
$\Gamma$, indicate that the source darkening has diminished and that the
spectral shape has flattened with time. The disruption of the star could have
come to an end. Nevertheless, a quiescent X-ray flux continues. Evidence for a
quiescent X-ray flux is presented.
