The Legion of Mary tessera is a small sheet containing the Legion of Mary prayers and a miniature reproduction of the legionary painting. It is provided to all members, auxiliaries or assets of the Legion.

The tessera has the following characters:

- Circulates among all legionnaires.
- Express the true password and legionary prayers.
- It is a garment of union and brotherhood between the partners, wherever they are.

The tessera is divided into three parts:

1. Prayers at the beginning: these are the prayers with which the weekly meeting of the Legion begins, this includes the recitation of the Holy Rosary.
2. The Catena Legionis: It consists of an antiphon and the song of the virgin (according to Lucas) and ends with a prayer.
3. Final Prayers: It is a series of invocations to the Blessed Virgin and a prayer typical of the Legion with which all the meetings of the weekly meeting end.

The Legion of Mary. The Tessera Legionis is a symbol of the unity of the Legion and of the brotherhood among its members. It is a reminder of your commitment to Mary and to the mission of the Legion. The Tessera Legionis is a card awarded to members of the Legion of Mary. It is a symbol of your commitment to the Legion and your mission to evangelize and serve others.

The Tessera Legionis contains the Legion's prayers and hymn, as well as the promise Legion members make to dedicate their lives to Mary and to serving others.