Payment Remittance Information

Download W-9

For proper credit, please be sure to reference the order/invoice number with your payment.

  1. Credit Card: Payment can be made online via the MyCoSN portal. We accept Visa, MasterCard, Discover,  and American Express.
  2. ACH/EFT: See invoice or contact finance@cosn.org for banking information.
  3. Check:  Please make check payable to CoSN and mail to PO Box 75110, Philadelphia, PA 19171-5110.

Common Questions

I can't locate the membership invoice. How can I proceed?
In order to see the invoice, you must be listed as a primary or billing contact. For assistance, contact membership@cosn.org.

Do you accept purchase orders?
Purchase orders can be submitted to finance@cosn.org.