The Canberra Liberals say documents released under freedom-of-information laws show breaches of the strict election caretaker conventions that forbid bureaucrats from offering political help to parties or candidates.

The Opposition's deputy leader, Alistair Coe, said there was a culture in some departments that was about supporting their minister of the day "at all costs", even if it meant breaching caretaker conventions.

The government has pledged to investigate any formal complaint made by Mr Coe.

The Liberal deputy leader confronted Territory and Municipal Services Minister Shane Rattenbury and his senior officials at a committee hearing on Friday with documents that Mr Coe claimed show clear breaches of caretaker conventions.

He produced a series of emails between a department liaison officer in the office of Chief Minister Katy Gallagher, who held the TAMS portfolio until the election, asking for briefings to prepare the minister for the Pedal Power ACT election forum.

In one of the emails, sent before the caretaker period began, the officer asked for a meeting with "relevant roads and budget people to get across this area which is shaping up as a big one for the election".

Mr Coe produced another example where the department was used two days into caretaker period on September 16 to produce a brief, much of which was reproduced word-for-word in an ALP policy document on animal welfare.

"This brief, funnily enough, flowed into the ALP election policy with the bits highlighted in pink taken straight from the government brief," Mr Coe told TAMS director-general Gary Byles at Friday's committee hearing.

"It does get me a little bit concerned that there is a culture within the department of supporting the government of the day and the minister of the day at all cost, even against caretaker convention.

"Is this the sort of culture rampant in departments, that there is a genuine willingness to help ministers, to help candidates, to help politicians in election forums?" Mr Coe asked.

Mr Byles told Mr Coe he was not aware of any branch of caretaker protocols.

"You're half-right there, Mr Coe, there is a culture of supporting the government of the day, but caretaker provisions are quite explicit about what you must or must not do," the director-general said.

"The culture of the directorate is to provide the best value for money and the best services for Canberrans. When we were approached by political parties, particularly around the election signage issue, I made sure that all three parties got the very same information, and I went to great lengths to do that."