All visa inquiries are handled by ACM Headquarters.
Please send your request for a letter in support of a visa application to
supportletters@acm.org. Include
your name, mailing address, and fax number, as well as the name of the
conference you are attending i.e. "FPGA 2011". (Authors of papers/posters
should also include the title). Please note that ACM does not issue formal
letters of invitation to any of its conferences.