Corby councillors have been asked not to respond to a letter sent out by Corby Cube architects Hawkins Brown.
A copy was sent to every councillor asking them to contact the company to allow it to defend itself over claims made in a report on the Cube.
In the report, commissioned by Corby Council into the escalating cost of the building which ran over budget by £12m, criticism was made of Hawkins Brown.
The company later challenged the accuracy of the report and asked for it to be removed from the council’s website.
Norman Stronach, acting chief executive of the council, said: “While the council takes into consideration the contents of the letter sent to councillors, we have advised that they do not respond directly for legal reasons.
“The council is planning on reconvening the scrutiny panel which undertook the Cube report to take into account the comments made in the letter and decide if it makes any alteration to the recommendations given.
“We are also still awaiting the Audit Commission’s independent report on the matter.”