n. credit; faith
A letter of credence is a letter sent by one head of state to another formally accrediting a named individual, usually but not always a diplomat.
Sentence in Classic:
And I should be false and base if I did not tell you, whether it is acceptable to you or no, and whether you are inclined to give credence to it or no, that you deeply wrong both Mr.
Great Expectations By Charles Dickens Context
Your father is Mercury, whom white Maia conceived and bore on the cold summit of Cyllene; but Maia, if we give any credence to report, is daughter of Atlas, that same Atlas who bears up the starry heavens; so both our families branch from a single blood.
The direct testimony was in almost all cases corroborated by the reports of the colleges where they graduated, so that in the main the reports were worthy of credence.
The Souls of Black Folk By W. E. B. Du Bois Context