Countrywide is set to incur the renewed wrath of the PIA for failing to provide accurate pension review figures.
The 800-member network's review figures submitted to the PIA and the Treasury for January do not match.
The error has come to light just a week after Countrywide was fined £250,000 for a catalogue of review failures.
The PIA says: "We will now have to consider how we can impress upon them the seriousness of providing accurate information."
The move is a further embarrassment for Countrywide chief executive Jim Gaskin, a former head of compliance at Fimbra. Gaskin refuses to comment on the error.
PIA head of press Sarah Modlock says: "We have given the firm the opportunity to provide accurate figures but we have been unable to get a satisfactory reaction."
Last week's fine took into account the network's public naming and shaming for missing its December 31 deadline for dealing with 90 per cent of priority review cases.
Four other networks were also named and shamed for missing the deadline.
Latest Treasury figures for number of cases completed by the end of January show that DBS is now the only firm to have resolved less than 25 per cent of its cases and is rooted to the bottom of the Treasury's table with just 10 per cent.
Burns Anderson has completed 27 per cent, Financial Options 32 per cent and IFA Network 53 per cent.