There are multiple definitions - click on the translation that matches your context.

Tatsachenbehauptung

Substantiv

partial

allegation

noun

Comparative law notes

Germany

If the assertion of fact relates to a malfeasance or wrongdoing, then this term is a close match. If the context is not entirely clear, then the better translation would be "assertion of fact"

Definitions of allegation

English

a statement that has not (yet) been proven to be true (and which may not be proven to be true in the future) claiming that someone has done something wrong or illegal

He had always denied any allegations of improper dealings.