Faultless display of the PDF forms on our site can only be guaranteed by using Adobe Reader. Opening the PDF forms with other PDF readers or browser plug-ins can cause error messages and display problems.
Alternatively, it may be helpful to first save the document to the hard disk and open it from there. To do this, right-click on the link and select “Save target as” or similar, depending on which browser you use.
Firefox 19 and newer versions have an internal PDF viewer. This is not capable, however, of displaying all forms correctly.