attester

/əˈtestə/

someone who affirms or vouches for the correctness or truth or genuineness of something

The undertaker of the burden of proof does not accord with the attester;
证明责任的负担者与证明主体并不一致；

单词造句:

源自attest/əˈtest/vt. 证明；证实；为 … 作证

近义词attestor/əˈtestə(r)/n.证人,证明者