The Charity Finance Group is a group of charity finance managers based in the UK.  They prepared recently a “Guide on Charity Fraud: A guide for the trustees and managers of charities”.  Canadian charities may find the free guide helpful in preventing and detecting fraud.  It is interesting to see the large number of organizations involved in producing the guide.

Charity Fraud: A guide for the trustees and managers of charities
http://www.cfg.org.uk/resources/Publications/cfg-publications.aspx