[header] How to write a guardianship letter [title] Check if your state allows guardianship letters. [step] Not all states recognize guardianship letters. Instead, they require that even temporary custody issues be handled through the courts. 
The state of maine, for example, requires parents to file papers with a court in order to seek a temporary guardianship. [substeps] Some states limit informal arrangements, such as those made by letter, to a six month period in order to be effective.