Open the PDF in a PDF editor that supports signature removal
Locate the signed field or signature box
Right-click the signature and choose Remove, Clear, or Delete
If the PDF is flattened, use the original unsigned file or ask for a new copy
In Adobe Acrobat, open Tools, select Certificates or Prepare Form, then remove the signature field if allowed
If the signature is digital and locked, verify permissions before editing
Save the file as a new PDF after removing the signature
If you only need to hide the signature appearance, redact or cover it with a white box
If the PDF is signed and you need to preserve integrity, create a new unsigned version instead of editing the signed one