Four in 10 business travelers admit to using corporate cards for personal purchases, according to research commissioned by Carlson Wagonlit Travel.  The practice is rife, even though 63 percent of Americans, and 58 percent of Europeans, say their company has a policy against using corporate credit cards for personal purchases, with an enforcement ratio of 85 percent in both regions. Among Asia- Pacific travelers, 69 percent said their company has such a policy, with an enforcement ratio of 87 percent.  Overall, six in 10 global business travelers said their employer provides them with a corporate credit card. Those in Asia-Pacific were likeliest to have one (67 percent), followed by those in the Americas (61 percent) and those in Europe (56 percent). Christophe Renard, vice president of CWT Solutions Group, the consultancy arm of CWT, said “Travel managers need to address the misuse of company cards and also work out why travelers don’t follow the rules.”