Credit card checksum error

Nancy Beaton's Avatar

Nancy Beaton

20 Aug, 2013 06:19 PM

I have been trying to enter someones cc info but i keep getting message saying seems to contain an invalid checksum, what does this mean, i have rechecked the number with the client, help please and thx

  1. 1 Posted by Dean on 20 Aug, 2013 09:14 PM

    Dean's Avatar

    Hi Nancy,

    The checksum is a simple validation tool using the Luhn algorithm to determine the authenticity of a card. It's used to mostly detect human error during the exchange of cc numbers. Really all I can say is that if the validation is failing, either the number is incorrect or there was some kind of error inputing it.


  2. Jess Pendley closed this discussion on 21 Nov, 2013 07:47 PM.

Discussions are closed to public comments.
If you need help with Cheddar please start a new discussion.

Keyboard shortcuts


? Show this help
ESC Blurs the current field

Comment Form

r Focus the comment reply box
^ + ↩ Submit the comment

You can use Command ⌘ instead of Control ^ on Mac

Recent Discussions

28 Mar, 2024 10:45 PM
24 Jan, 2024 08:33 AM
11 Jan, 2024 07:13 AM
30 Nov, 2023 02:07 AM
22 Nov, 2023 08:41 AM