Collaborative Testing Services, Inc. 
P.O. Box 650820, Sterling, VA, USA 20165-0820 1-571-434-1925
The CTS Questioned Documents Examination proficiency test is designed to reflect actual casework. The complex and challenging scenarios are constructed to accommodate a range of laboratory capabilities. Samples vary from ink markings to impressed writings to identification of a printing process. For those seeking a narrower focus, the Handwriting Examination proficiency test is designed solely for the examination and comparison of handwriting. High-quality digitally-produced photographs or digital images downloaded directly from our portal offer multiple exemplars and allow your personnel to really work this case.
| 5211 Questioned Documents Examination | ships | February |
| 5241/5245 Handwriting Examination | ships | September |
Manufacturer's Information reports for all Questioned Documents tests can be found on the CTS Customer Portal.
