Employer's Letter of Support, addressed to the Visa Office of the Department of State. This letter should contain information relating to the applicant's position, the nature of the business or profession, and an explanation as to why the visa is needed. Include a list of dependents. Also, it should indicate when the assignment ends. Visa fees in the form of a money order, bank draft, corporate check or certified check, payable to the U.S. Department of State.
Fees vary depending on nationality.
If you need additional information. This fee is in addition to any applicable visa fees. A Self Addressed and Stamped Envelope or a completed courier envelope for the return of the passports. Sample Cover Letter Re-issuance can take eight to twelve weeks. If you do not have time to complete the processing in the United States, you should pursue your application at a U.S. Embassy or Consulate when you are abroad.