In custody cases, the “joint custody” usually refers to one of two possible situations: the physical custody and joint legal, or joint legal custody.
In the agreements authentic “joint custody”, the parents share equally the rights of the “legal custody” and “physical custody”. This means that parents participate equally in making decisions about the growth and well-being of the child, and divide equally the time and the responsibilities involved in their daily care — including the right of parents to have the child live with any of them. Agreements authentic custody are rare because they have the potential to cause both personal difficulties (stress, disruption of the routine of the child), as practical problems (scheduling, costs of maintaining two separate spaces for the lower dwell).
The custody is “joint legal” is much more common that agreements are authentic about custody (where physical custody and legal shared). With the custody “joint legal” both parents share the right to make long-term decisions about the upbringing of the child and about aspects of their well-being, but physical custody is granted to one parent.