500
The U.S. Consulates in other countries often require _________ as a condition for issuing visas for foreign travelers coming to the U.S.
An invitation letter
Some companies must write a letter of invitation when they host business visitors from abroad. Business visitors can be existing or potential buyers, investors, trade show or conference visitors, partners, employees, or individuals coming for training at the company’s facilities.
If you need a visa, a letter of invitation does not guarantee that a visa will be issued. Some letters need to be notarized.