Invoice number is issued when you used the CCL service. It is
provided in the emails confirming your service or payment,
in the invoice itself, and in the receipt of payment.
The number is just a time of service augmented with a random
number for security.
For example, if you posted a job ad to the
CCL Job Page on
If you cannot find your invoice numbers, you need to ask us. Just send e-mail to and provide us with your name and affiliation, a short description of the service(s) that was provided, and an approximate time of service(s), so we can locate this information in our payment logs. We will promptly email you back your invoice number(s).
The ordering of CCL supporters on the Supporting
Members page depends on the sum of the amount that you are pledging now
(which may be none if you are claiming your Free entry as a past customer)
and the sum of paid invoices that you are entering (which may be none,
if you do not claim past support). You can enter one or more invoice numbers
that correspond to the paid services of CCL within the past year.
In this case, please enter them under
On top of this, you can enter additional contribution
Thank you for your support of CCL!