The one time defender, who is now football development manager at the club, was also ordered to pay £300 compensation after finding himself locked out by his wife and kicking the door of the house.
His solicitor, Ranald Lindsay, stressed to the court at Dumfries this week that no damage was done and the matter was not reported to the police until three weeks later.
In the dock, Thomson, of George Street Mews, Dumfries, admitted behaving in a threatening or abusive manner and repeatedly kicking the door at Woodgrove Avenue in the town on January 4.
Fiscal depute Lyndsay Hunter said Thomson and his wife had separated in November and on the day of the incident Thomson had texted her and telephoned to say he would call and collect some belongings.
But when he arrived he found the door locked and was refused admission and in response kicked the door.
Mr Lindsay said that Thomson had needed some of the possessions for work next day and when he had sent the messages there seemed no disagreement and he was surprised to find the door locked and kicked out at it in frustration.
He added: “Thomson had kicked out on an impulse and was angry at himself for re-acting in this way.”
And he stressed that the incident was not reported until three weeks later after his wife had consulted with a solicitor.