The governing body says that the 41-year-old is banned for "committing too many mistakes" in CSKA Sofia's 2-1 Bulgarian Cup win at Ludogorets on Wednesday
The BFU said the 41-year-old official made too many mistakes in the Bulgarian Cup match between Ludogorets and CSKA Sofia on Wednesday.
The Bulgarian was banned after CSKA appealed against "the extremely biased refereeing" and complained that the official had failed to award them two penalties along with a number of other errors in the match.
"He'll be suspended and you'll not see him officiating a game for a long time. He committed many mistakes," BFU refereeing commission chief Nikola Dzhuganski told local media on Friday.
The 31-times Bulgarian champions asked the BFU not to use Ristoskov for their matches. The match ended 2-1 to CSKA Sofia.
After the game, CSKA's captain Ivan Bandalovski could not hide his frustration with Ristokov's performance.
"I've never seen such refereeing, it's not normal," he explained. "My desire to play football disappears after matches like this."