ContributionsMost RecentMost LikesSolutionsRe: Check files without certification information I did similar things but using script: My code like var certinf0 = aqFileSystem.GetFielInfo(file).CertificateInfo; then I try to do some comparison like aqObject.CompareProperty(certinfo.Subject, cmpContains, "some signature", true, 0); Error occured: Re: Check files without certification information Hi Marscha, Thanks for your feedback... however I know this Weblink and I have to highlighten one sentence in there .... If you try to call properties or methods on such a certificate from your tests, an error will occur....... Means I got an "empty" CertInfo back in case of that the file does not have any digital signature. My question is how can I know its an "empty" CertInfo before I do any checks on its properties.... Re: Check files without certification information But how... As I said... There will be one aqFileCertificateInfo Object (empty value) returned back... If I want to check its properties.. broken with error Check files without certification information if the file does not have Certification information, The returned aqFileCertificateInfo will be one with empty string value. Error will be occured when someone try to check property. How can I know its a file without certification information before I try to do more checks?