letters rogatory

/L EH1 T ER0 Z R AA0 G AH0 T AO0 R IY0/
noun
  1. 1

    A formal request from a court to a foreign court for some type of judicial assistance.

    โ€œThe most common remedies sought by letters rogatory are service of process and taking of evidence.โ€

Source: https://en.wiktionary.org/wiki/letters%20rogatory