If you have a family Jathagam written on palm leaf or old paper, check if it follows (look for words like "Vakyam" or "Thiruvilaiyadal" ). For accurate rectification, consult a traditional Tamil astrologer who maintains the lineage of Vakya computation.

Example Vakya for Moon: "Ezhil mel soodi ennai vaai yettrai" – a coded verse meaning "Moon’s longitude = 28° in Mesha (Aries)."