Daniel Cousin's future is unclear after the Scottish Premier League revealed the striker had not been registered by Rangers prior to administration.
Rangers announced on Monday that a deal had been done to sign the 35-year-old subject to international clearance - just as it emerged the club had filed notice of their intention to go into administration.
That process was completed on Tuesday and carries automatic restrictions on registering players with the SPL.
A statement from the league read: "The SPL can confirm the application has been received for the registration of Daniel Cousin.
"The player has not yet been registered with the SPL and we intend to discuss that application with the administrators of Rangers FC this week."
The SPL earlier released a statement outlining Rangers' punishment for going into administration.
An SPL spokesperson said: "As Rangers FC is subject to an insolvency event, a 10-point deduction has been applied to its total points in the league championship for the current season.
"In addition, Rangers FC is subject to restrictions on the registration of players with the SPL whilst in administration.
"We are seeking an early meeting with the administrators."