An informal information for payment

You can make a payment on site (with cash).
If you are going to do that, I would register ahead
of time with a purchase order.
You can also pay via bank transfer, here's the bank information:
Payments made to ACM by wire transfer through your bank must be sent to:

Association for Computing Machinery/
Bank of New York
1290 Avenue of the Americas
NYC Commercial Banking
New York, NY 10104
USA
Attn: Scott Silverstein
Routing Information:

ABA# 021000018

Account Number:

1142584839

Remember to include your name and ACM member number. If you
are currently a member, indicate the nature of your payment
(renewal, additional services, single copy purchase). If you are a new
member, please include your name and full mailing address, also noting
"New Member".

In order to ensure that your payment is applied correctly,
please have your bank forward the above information.

If you have any questions, please contact our Member Services
Department.

Sincerely,
ACM Member Services
+1-212-626-0500(Global)
1-800-342-6626(US and Canada)
ACM Homepage: http://www.acm.org/