Video:-
Steps:-
If you want to create terms and conditions check box, please follow below steps
1) First create one new field for this by clicking on the “+”.
2) Switch to advanced mode
3) Just create one field with Column name: “termsandconditions” or something you like
4) Attribute type: Text
5) Attribute size:10 (your choice)
6) in Field type: select MULTIPLE CHOICE
7) Now you will get options below of it, Select “Options (one value;name pair on each line – example: 1;Blue)“
9) Then in text area just type “True;” or “1;” or “agree;”
10) Please type the error message Error message:
10) Then click on the ok button.
Now that check box become a required input user must checked. Else it will show error message.
Source : http://devnet.kentico.com/Knowledge-Base/Web-parts—Controls/How-to-create-check-box-in-BizForm-that-is-require.aspx
Enjoy while coding..!