[L. cancellatio: cf. F. cancellation.]
1. The act, process, or result of canceling; as, the cansellation of certain words in a contract, or of the contract itself.
2. (Math.) The operation of striking out common factors, in both the dividend and divisor.
A notice informing a customer of the cancellation of an erroneous trade that has been credited to his or her account by the broker.
Investopedia Says:
Even stock brokers are subject to human error. When an error is made, set guidelines must be followed to rectify the situation.
For example, if a broker mistakenly over-purchases 100 shares of Cory's Tequila Corporation for your account, he or she must sell the 100 shares and bear any losses in his or her internal account. Each transaction is properly recorded and you will be sent statements showing the changes to your account. The procedure is done to ensure that the broker is not improperly trading for your account.
Related Links:
Find out how to avoid - or fix - these frequent investing errors. 7 Common Investor Mistakes
These key stats will reveal whether your advisor is a league leader or a benchwarmer. Does Your Investment Manager Measure Up?
These simple lessons can cut your losses. Four Big Investor Errors
Find out the various ways in which a broker can fill an order, which can affect costs. Understanding Order Execution
We go over the factors that determine different investing personalities, and the services that best suit them. Choosing A Compatible Broker
Smart investors don't give away more money than necessary in commissions and fees. Find out how to save. Don't Let Brokerage Fees Undermine Your Returns
Investing online is cheaper, safer and easier than ever before. Find out how to choose the broker that will help you get the most for your money. 10 Tips For Choosing An Online Broker