title: PdfBox showing certified by instead of signed by in digital signature
body: <p>I have put digital signature via Pdf Box using this <a href="https://github.com/xiaojiahuo/pdfbox/blob/master/examples/src/main/java/org/apache/pdfbox/examples/signature/CreateSignature.java" rel="nofollow noreferrer">example</a></p>
  <p>I digitally sign a pdf twice.</p>
  <ul>
  <li>First time it showing : <strong>Certified by My SSL Certificate</strong></li>
  <li>Second time it showing : <strong>Re.2. Signed by My SSL Certificate</strong></li>
  </ul>
  <p><a href="https://i.stack.imgur.com/JiQXw.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/JiQXw.png" alt="enter image description here" /></a></p>
  <p>It should show first time <strong>Re.1. Signed By My SSL Certificate</strong></p>
  <p>any update ?</p>