Corroboration is independent confirmation that something is true. Seek corroboration, without corroboration, corroboration of the account.
The independence is the whole point: a second witness who heard it from the first is not corroboration. Scots law long required it in criminal cases, which is unusual among legal systems.
1nouncorroborationIndependent confirmation that something is true.
“The police needed corroboration of her story before they could make an arrest.”
corroboration is a confirmation.
Latin corroboratio means a strengthening, from com- plus robur, strength or oak.
Latin
corrōborātiō — strengthening
Middle English
corroboracioun
English, today
corroboration
From Middle English corroboracioun, borrowed from Latin corrōborātiō (“strengthening”).
Etymology from Wiktionary, CC BY-SA