  We present here a validation of sub-Saturn exoplanet TOI-181b orbiting a K
spectral type star TOI-181 (Mass: 0.822 $\pm$ 0.04 M$_{\odot}$, Radius: 0.745
$\pm$ 0.02 R$_{\odot}$, Temperature: 4994 $\pm$ 50 K) as a part of Validation
of Transiting Exoplanets using Statistical Tools (VaTEST) project. TOI-181b is
a planet with radius 6.95 $\pm$ 0.08 R$_{\oplus}$, mass 46.16 $\pm$ 2.71
M$_{\oplus}$, orbiting in a slightly eccentric orbit with eccentricity 0.15
$\pm$ 0.06 and semi-major axis of 0.054 $\pm$ 0.004 AU, with an orbital period
of 4.5320 $\pm$ 0.000002 days. The transit photometry data was collected using
Transiting Exoplanet Survey Satellite (TESS) and spectroscopic data for radial
velocity analysis was collected using The European Southern Observatory's (ESO)
High Accuracy Radial Velocity Planet Searcher (HARPS) telescope. Based on the
radial velocity best-fit model we measured RV semi-amplitude to be 20.56 $\pm$
2.37 m s$^{-1}$. Additionally, we used \texttt{VESPA} and \texttt{TRICERATOPS}
to compute the False Positive Probability (FPP), and the findings were FPP
values of $1.68\times10^{-14}$ and $3.81\times10^{-04}$, respectively, which
are significantly lower than the 1% threshold. The finding of TOI-181b is
significant in the perspective of future work on the formation and migration
history of analogous planetary systems since warm sub-Saturns are uncommon in
the known sample of exoplanets.
