PaperPrincess

You can't really cut the tulle too close to the letters because you run the risk of clipping some of the stitching and unraveling the embroidery. I would do as Prism suggested and leave the tulle on and stitch around the letters. Almost all tulle is synthetic with a low melting point. If the letters are wide enough and you can find a low temp fusible, you could try to put a small amount of fusible under the embroidery (test first), but you should still stitch around each letter. If you try this, you can only put the fusible under the embroidery, not under any of the open tulle. You also should find out the type of embroidery thread she used (poly? cotton? rayon?) and also what was in the bobbin. Most pre wound embroidery bobbins are poly so can't take a high heat iron. If you do something similar in the future, you should have your friend do the embroidery directly on the fabric you are going to use in the quilt.