Responsa for Shevuot 59:2

בפני בית דין ושלא בפני ב"ד מפי עצמו ומפי אחרים אין חייבין עד שיכפרו בהן בב"ד דברי ר' מאיר וחכמים אומרים בין מפי עצמו ובין מפי אחרים אינן חייבין עד שיכפרו בהן בב"ד

TO THOSE QUALIFIED [TO BEAR WITNESS] AND NOT TO THOSE UNQUALIFIED;<span class="x" onmousemove="('comment',' Such as, e.g., a robber.');">⁴</span> AND IT APPLIES ONLY TO THOSE LIABLE TO BEAR WITNESS; AND WHETHER [UTTERED] BEFORE THE BETH DIN OR NOT BEFORE THE BETH DIN, IF [UTTERED] WITH HIS OWN MOUTH; BUT IF [ADJURED] BY THE MOUTH OF OTHERS HE IS NOT LIABLE UNLESS HE DENIES IT BEFORE THE BETH DIN; THIS IS THE OPINION OF R'MEIR'BUT THE SAGES SAY: WHETHER [UTTERED] WITH HIS OWN MOUTH OR [ADJURED] BY THE MOUTH OF OTHERS HE IS NOT LIABLE UNLESS HE DENIES IT BEFORE THE BETH DIN. AND THEY ARE LIABLE FOR WILFUL TRANSGRESSION OF THE OATH, AND FOR ITS UNWITTING TRANSGRESSION COUPLED WITH WILFUL [DENIAL OF KNOWLEDGE OF] TESTIMONY;<span class="x" onmousemove="('comment',' Knowing testimony for the litigant, and wilfully denying the knowledge on oath, but transgressing unwittingly so far as the sacrifice is concerned, i.e., not knowing that they are liable to bring a sacrifice for the transgression of the oath.');">⁵</span>

Teshuvot Maharam