Error Prevention (Legal, Financial, Data)

Understanding WCAG2.0

Forms that can cause serious losses due to user input such as "legal things", "financial transactions", "tests", etc. must cancel the submission or provide a confirmation screen before submit. It feels like level A, but it is level AA.

Principle Understandable Information and the operation of user interface must be understandable.
Guideline Input Assistance Help users avoid and correct mistakes.
Criterion Error Prevention (Legal, Financial, Data)
(3.3.4 AA)
On a web page where a legal act or a financial transaction occurs for a user, the data on the user-controllable data storage system is changed or deleted, or the user sends an exam answer, either cancellation, check or confirmation It is made to be able to do.

URL of Techniques for WCAG 2.0