Access Denied while changing name of a Document of Document Library

It is natural to assume that if you have Modify permission on any SharePoint item/document then it means you can update any property of that document, right? Wrong! You can update any property of a document/item except Name property. This is because in SharePoint terms, changing the name of the document means two things:

1. Creating a copy of the current document with the new name and
2. Deleteing the current document.

If you don’t have Delete permission and just have Modify permission then you can modify every property except the Name property.

So, if you are getting Access Denied error while changing the Name of a document of a SharePoint Documnt Library and you know that you have the Update/Modify permission on that doucment then make sure you also have Delete permission on that document.