Town have issued a High Court writ against Suffolk Constabulary seeking £511,869 it claims it was illegally billed for policing outside Portman Road at home games between 2008 and 2013.
In 2012 the High Court ruled that West Yorkshire Police had overcharged Leeds United for "special police services" between 2009 and 2012, the Whites having argued that policing the roads and car parks around Elland Road is not their responsibility.
As a result of that ruling, Town are understood to be amongst a number of clubs taking similar action to reclaim cash previously paid - plus interest - for policing around stadia on matchdays. The Blues were charged from £5,926 to £25,242 per fixture.
A club spokesman told TWTD: "The matter is with both respective legal advisors and the club has no further comment to make at this time.”
A police statement reads: "We are aware of the writ but as this is subject to ongoing legal proceedings it would be inappropriate to comment further at this time.”