One of the mysteries of the English language finally explained.
A recredential letter.
Of a letter: sent by a government to its ambassador for presentation to the government of the country from which the ambassador is recalled, or given by the government of the country from which an ambassador has been recalled for presentation to the latter's government. Occasionally as postpositive.
Mid 17th century. From recredential<br>mid 17th century. From re- + credential. Compare later recreance, recredence.
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