How to Create a Stamp Effect With Inkscape

Pattern along a Path

1. 
   Using the Rectangle Tool draw a rectangle.
2. 
   With the Ellipse Tool, draw a circle (keep the Ctrl key pressed to get a circle).
3. 
   Select the circle and then the rectangle.
4. 
   And put the circle on the path defined by the rectangle (Effects > Generate from Path > Pattern along Path). Ensure copies are Repeated, the deformation type is Snake and adjust the space to fit the size of your circle:

   1. You will get a contour made from circles for your rectangle.
5. 
   Select the contour and subtract it (Path > Difference) from the rectangle.

   1. This is the perforated paper.
6. 
   Change its color to something paper-like, white or something near white (a very light yellow for old paper).
7. 
   For a shadow which will make the paper more visible, duplicate the shape and make the copy black.
8. 
   Put it at the bottom of the stack and move a little to the right and down.
9. 
   Slightly blur the shadow and if you want, adjust its transparency.

   1. This is what it should look like at those point.
10. Optionally, for increased realism, rotate it a little.