Following are step by step for Online Payment by Credit or Debit Card at http://www.one.pa.gov.sg :-
 
1) Log on to http://www.one.pa.gov.sg
2) Type in the class code :"eBay" under "Keywords" at the top right hand side;
3) Click and select "Chua Chu Kang CC" in the drop down box;
4) Click on the search arrow or press the Enter key to start searching;
5) Click on "Click here to register for this session";
6) Scroll down to the bottom of the page;
7) Click and select Participant's Nationality;
8) Key in Participant's NRIC or Birth Certificate number;
9) Click on "ADD" button;
10)Click on the circle beside "Class Fee";
11)Tick the checkbox to declare  you are satisfied with the terms and conditions;
12)Click on "Submit";
13)Click on "Pay Now" ;
14)Click on "Pay Online" ;
15)Click "OK" ;
16)Click on "ENETS Credit/Debit Card " icon ;
17)Key in your card information and click "Submit" ;
18)Print the receipt .