度牒

dùdié
Buddhist or Taoist ordination certificate issued by government

CEDICT

government permit allowing someone to be ordained a Buddhist monk or nun or Taoist priest

Wiktionary

舊時官府發給合法出家人的證明文件。源於唐代，沿用到清代。上載僧尼的本籍、俗名、年齡、所屬寺院、師名以及官署關係者的連署，僧尼以此牒為身分憑證，可免徭役。

重編國語辭典

Entry Composition

1 度 dù
  1. to pass
  2. to spend (time)
  3. measure
  4. limit
  5. extent
  6. degree of intensity
  7. degree (angles, temperature etc)
  8. kilowatt-hour
  9. classifier for events and occurrences
2 牒 dié
  1. (official) document
  2. dispatch