Blank copies of the 2018 UN-CTS questionnaire as well as an information document that specifies the tasks that the UN-CTS Focal Points should perform are available in the six official languages of the United Nations from the following link:
http://www.unodc.org/unodc/en/data-and-analysis/statistics/crime/cts-data-collection.html
In addition, data from previous survey waves are accessible from the following link:
http://www.unodc.org/unodc/en/data-and-analysis/crime-and-criminal-justice.html