Dundee United have questioned the Home Office's integrity after St Johnstone were granted a work permit for former United striker Jason Scotland.
Scotland was denied the right to play for Dundee United
Earlier this month United were angered by a Home Office decision to deny the Trinidad & Tobago international an extension to his permit.
A football review panel ruled he did not make a significant enough impact during his two seasons at Tannadice.
United say the latest decision makes a "laughing stock" of the system.
"The action taken today to reverse all of this and grant a permit for him to play for a club, which, up until now, has had no connection with the player, can only be described, at best, as absurd and well-nigh unbelievable," a club statement said.
"While we have nothing against St Johnstone, this decision today clearly questions the integrity of the UK Home Office system.
"Today's decision confirms, as we have said all along, that the original decision was categorically wrong.
"The case put forward by St Johnstone was the same as we gave to the Home Office minister in our dossier of 15 July. The player's position has not altered since then as he hasn't kicked a ball in earnest since the Home Office minister turned us down.
"This wholly sorry absurd situation makes a laughing stock of the system carried out when determining whether or not to grant a player a permit to play for a club in this country."
The player's agent Mike Berry told BBC Scotland he was "elated, after six or seven weeks of having his livelihood taken away from him".
"However he would still rather be a Dundee United player," he added.
St Johnstone manager Owen Coyle told the club's official website: "I am delighted our application has been approved.
"Our presentation was done on the basis that Jason can make a significant contribution to St Johnstone Football Club and the Scottish Football League and I'm pleased our presentation was well received.
"We don't physically have the permit as yet, but that will follow and we will be speaking to Jason and his agent tomorrow (Wednesday) with a view to getting things concluded as quickly as possible."