Document Validators checks the signature and the certificate(s) in documents.
XML Validator
The XML Validator validates the signature of XML documents. The certificate is checked by the configured certificate validation service. See XML Validator.
XAdES Validator
The XAdES Validator validates the signature of XAdES documents and validates the certificate chain. The validator will also validate embedded timestamp tokens in XAdES form T-signed documents. See XAdEs Validator.