Flow liquefaction is a behaviour observed in saturated or nearly saturated geomaterials that show a strain softening response during undrained shear, mostly observed in very loose sands and silts as well as very sensitive clays. The Cone Penetration Teste (CPTu) has been gaining in popularity among the geotechnical community to evaluate the state of a soil profile, due to its good repeatability, detailed information of the soil stratigraphy and extensive detailed scientific studies to guide the application of the test results. Susceptibility to flow liquefaction is typically evaluated by estimating the in-situ state parameter (Ψ), since it directly correlates to the soil behaviour at large strain as shown by Jefferies & Been (2016). Mayne & Sharp (2019) suggested the use of the yield-stress-ratio (YSR = σp’/σv0’) to estimate the soil state using a threshold of YSR = 3. Currently in the Brazilian Mining Industry, it is common to find the application of different approaches to evaluate the susceptibility of mining tailings to flow liquefaction (e.g., Plewes et al., 1992; Olson, 2001; Olson, 2009; Shuttle & Cunning, 2008; Robertson, 2016). This paper presents an evaluation of the susceptibility of an iron ore tailings (IOTs) to flow liquefaction using the following recently published approaches: i) Mayne and Sharp (2019), using the yield stress ratio (YSR) approach; ii) Smith et al. (2021), using a generalised CPTu state parameter inversion method based on the NorSand Widget; and iii) Robertson (2022), with the updated Kc. The results and main differences will be highlighted and a discussion will be presented about limitations and advantages of each methodology.