A prosecution document tendered to the ACT Magistrates Court also accused the defendant of sending numerous threatening text messages to the Child and Youth Protection Services worker after the agency took emergency action towards the children last year.

The man, who is not named for legal reasons, appeared via phone in the ACT Magistrates Court on Thursday.

He has not pleaded to the charges of impersonating a territory public official, threatening or intimidating a witness and stalking.

He has also not pleaded to using a carriage service to harass, knowingly obstruct a territory public official and damaging property.

The prosecution document states that, following his consent to a court protection order and a safety plan related to his children, the defendant messaged one of the workers, accusing her of lying in her affidavit to the ACT Children's Court.

He allegedly said "you make my kids suffer everyday because you have no f---ing clue to what your [sic] doing...tables will turn one day promise you that".

"You took 'em [sic] for no reason now we suffer can't sleep over it everyday how bout you f---ing do drug test your self," he is accused of saying.

In another message, the defendant apologised to the worker, saying "at the time I was extremely frustrated" because he missed his children.

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The worker also received a text message from a sexual health centre, allegedly organised by the defendant, saying she had been exposed to Syphilis and recommended she visited her doctor.

The protection services received an email allegedly from the defendant urging for workers to "be stood down from their positions" and accused the services of having a corrupt system.

Then in January, the defendant allegedly impersonated the worker by sending an email to her employer about resigning.

His email stated he was approached by the media to "let them know the false bulls--t we made up on people I get paid a fortune while you b----s [sic] can suck it".

The defendant also allegedly contacted a mental health service in the worker's name to accuse two of her colleagues of forcing her "to do sexual unwork [sic] related explicit photo".

The worker was relocated due to the alleged harassment and intimidation and safety concerns.

Magistrate Glenn Theakston in March issued police with warrants for the defendant at his home where he was arrested.

He became agitated while waiting to be taken to the ACT Watch House and allegedly used the handcuffs to hit a police vehicle.

Police also executed a search warrant at his house and found the care and protection order and a "prosthetic penis with an attached bladder".

In court on Thursday, the defendant had a third bail application refused.

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