Satnam Kaur, 30, was alleged to have taken cash from two accounts while working as a customer advisor. It was claimed she withdrew money as euros and deposited a £120,000 cheque into her own account and was later sacked from the Albyn Place branch in Aberdeen.
She was due to go on trial at the city's sheriff court yesterday, but vital words - "by authority of Her Majesty's Advocate" - required by law were missing from the indictment.
It effectively meant the case had not been officially authorised by Scotland's top legal officer.
Depute fiscal Elaine Ward explained the Crown initially believed that Miss Kaur was going to plead guilty and so had not fully prepared for trial.
A document was later produced which failed to produce the words, but the error had not been picked up.
Prosecutors are legally bound to bring a criminal case against an accused person within 12 months.Miss Kaur's time bar ran out on Friday and Sheriff Graeme Buchanan refused a motion to extend it stating the Crown had shown a "lack of focus and direction".
RBS refused to comment.