Black's Law Dictionary (2nd edition)dictionaries

Si Ita Est

Lat. If it be so. Emphatic words in the old wrlt of mandamus to a judge, commanding him, if the fact alleged be truly stated, (si ita est.) to affix his seal to a bill of exceptions. Ex parte Crane. 5 Peb 192, 8 L. Ed. 92

Source: Black’s Law Dictionary 2nd Ed (1910)