GARDAI found forged €50 notes hidden in a student's box of tampons, a court was told.
Other forgeries were found in a DVD box in the same house where student Sinead McCormack lived, Sligo District Court heard.
McCormack (26), a student of computers, admitted possession of four forged €50 notes at her home in Bruach na hAbhainn, Coolaney, Co Sligo, on September 9, 2012.
She also admitted tendering two of them in shops in Tubbercurry and Ballintogher, both in Co Sligo, on successive days in August 2012.
Inspector Donal Sweeney told the court that when McCormack's house was searched gardai found three forged notes in a box of Tampax and another two in a DVD box.
McCormack told the court that she was "given" 10 of the forged notes at a party at her house but she didn't know the person who gave them to her. She told Judge Kevin Kilrane: "I was at a party and someone offered them to me. I don't know who it was.
"That is why I couldn't give the information to the gardai."
She added that she had four notes when she was questioned by gardai and she had dumped the others in the bin.
She said: "I got them for a joke. It was something stupid at a party in my house."
She told her solicitor Tom McSharry that she was in college now and had recently passed examinations with distinction.
She had €250 to donate to a charitable cause named by the court.
Judge Kevin Kilrane rejected the offer of money for charity. He imposed a three months suspended sentence on McCormack who, he noted, had previous convictions for drugs offences.
He said he didn't believe a word of her explanation about how she obtained the forged notes.