Hello George,
you can remove borders of objects by selecting the specific object, so you see the resize/rotate handles, and than show the "Graphic" inspector and choose the item "None" of the stroke type menu in the "Stroke" section.
But perhaps the border is made of an object laying in the master page. Than you can't select it without making it selectable. For that, choose the menu item "Format > Advanced > Make Master Objects Selectable". Select the object and delete it.
Now there is the chance that the object is laying behind the main text area of the page and you can't select it by clicking on it. If it is so, click beside the object near the page border where no text area or object is and drag so the select frame touches the object. If you have selected other objects, too, hold the shift key pressed and deselect the other objects.
If this all don't help you, please describe your layout with more details or write us, which template you have choosen for your document.
