Notburga was born about 1265 at Rattenberg on the Inn river. She was a cook in the household of Count Henry of Rattenberg, and used to give food to the poor. But Ottilia, her mistress, ordered her to feed any leftover food to the pigs. To continue her mission, Notburga began to save some of her own food, especially on Fridays, and took it to the poor.

According to her legend, one day her master met her and commanded her to show him what she was carrying. She obeyed but instead of the food he saw only shavings, and instead of wine, vinegar. As a result of Notburga's actions, Ottilia dismissed her, but soon fell dangerously ill. Notburga remained to nurse her and prepared her for death.

Next, Notburga worked for a farmer in Eben am Achensee, on the condition that she be permitted to go to church evenings before Sundays and festivals.

One evening her master urged her to continue working in the field. Throwing her sickle into the air she supposedly said: "Let my sickle be judge between me and you," and the sickle remained suspended in the air.

Shortly before her death she is said to have told her master to place her corpse on a wagon drawn by two oxen and to bury her wherever the oxen stood still.

The oxen drew the wagon to the chapel of St. Rupert near Eben, where she was buried.