Solicitors representing the Hillsborough Justice Campaign are to write to the IPCC to make a formal complaint over claims the police spied on families of the 96.
The Home Secretary Theresa May said the IPCC hadn't received a complaint over allegations families were put under police surveillance after the Hillsborough disaster.
Broudie, Jackson and Canter Solicitors in Liverpool who represented the late Anne Williams said the claims must be fully investigated.
More top news
Cumbria will accept 285 people over the course of three years, with the first refugees expected to arrive in April 2017
Rail fares in Britain are set to rise by 2.3% next year. Here is how the rise will affect commuters on routes across the country.
A "monster" who bludgeoned his former girlfriend and her mother to death with a hammer has been jailed for at least 29-and-a-half years.