These are particularly useful as they prevent the expensive and often tedious accounting nightmares created by using personal accounts for business purposes. (creditcardeducation.com)
You're probably creating your own personal accounting nightmare if you are making the minimum payment on one credit card with cash advances from another. (moneyproblems.ca)
Sometimes large companies allow you defer across a tax year (one bank I worked for allowed a shift from December to January for this exact purpose), but eventually they stopped that as it made a tax accounting nightmare for them. (money.stackexchange.com)