What are the best answers for “a document attesting to the truth of certain stated facts”?

certificate, credential, credentials.

How many letters does the top answer for “a document attesting to the truth of certain stated facts” have?

The most common answer is certificate (11 letters).

3 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

certificate 11 letters wn-def

a document attesting to the truth of certain stated facts

credential 10 letters wn-def

a document attesting to the truth of certain stated facts

credentials 11 letters wn-def

a document attesting to the truth of certain stated facts