Difficulty in obtaining L petition approval

Question:

Our large international company filed three “L” petitions recently with USCIS and two were requested for more evidence, asking for extensive documentation. One was eventually approved and one was actually denied. Do you have any suggestions?

 Answer:

Have you looked into the possibility of obtaining an “L” blanket approval?  Once approved, it will avoid long processing delays and sometimes impossible requests for additional evidence issued at certain USCIS offices.

| Nonimmigrant