Before traveling to Mexico, make sure that you have following documents.

• Passport
  
  
• One photograph
  
  
• Original Form I-94
  
  
• Appointment letter from consulate
  
  
• An application fee of $131 (or its equivalent in Mexican pesos or Canadian dollars) in advance at any branch of Banco BANAMEX (Banamex Bank). This fee needs to be paid after entering Mexico and before the interview. The bank will issue a receipt which must be presented at the time of the visa interview.
  
  Some visas may have an additional visa issuance fee (Citizens of India no longer have visa issuance fees, except blanket L1 applicants). In that case, payment needs to be made to the US Consulate cashier. Only US dollars and Mexican pesos are accepted for payment. Credit cards are NOT accepted.
  
  
• Original DS-156, Non-Immigrant Visa Application Form
  
  If you make an online appointment, you will be able to fill out all the details of this form online and print it out from your computer.
  
  You must print and bring all 3 pages of the completed Electronic Visa Application Form (EVAF), including the barcode, to your visa interview.
  
  If you are a citizen of Cuba, North Korea, People's Republic of China, Russia or Vietnam, you must also bring two DS-156 forms and two photos.
  
  Sample page 3 with barcode
  
  
• Original DS-157, Supplemental Non-Immigrant Visa Application Form. This is required if you are a male between ages 16 and 45.
  
  If you make an online appointment, you will be able to fill out all the details of this form online and print it out from your computer.
  
  
• Original bachelor's and/or master's degree certificates or transcripts. If this is not available, get a letter from your school stating a valid reason why.
  
  
• Copies of tax returns
  
  
• Latest bank statement proving that you have enough financial resources to take care of your expenses.
  
  
• In case of a lost or stolen previous visa, present the policy report. Complaints will be accepted at no charge by calling 01-800-719-2525 in Mexico.
  
  
• H1B
  • The original approved Notice of Action Form I-797, top and bottom parts.
    Samples: New H1, Extension
    
    Consular officer does not accept Form I-797 as sufficient evidence for visa adjudication. Petition approval and visa eligibility must be confirmed in the Department of State's Petition Information Management Service (PIMS) database. PIMS verification takes on average 24-48 hours to complete. A visa will not be authorized in the interim.
    
    When scheduling the appointment, you will be asked for the approved I-129 petition receipt number. If you schedule an appointment earlier, you should fax a copy of your approved I-797 to the NIV section at least 72 hours prior to your interview data. Please include the date and time of your appointment, as well as the confirmation number given to you by the appointment call center. Consular staff will determine whether your petition is registered in PIMS, and if it is not, will request that the petition be verified and added to the database.
    
    Even though the consular emdeavprs to provide the most expeditious service possible, there is no guarantee of same day service and the the visa processing may takes. Therefore, you should make trip arrangements accordingly.
    
    
  • Employment verification letter from the employer. It would be helpful to mention the employee strength, ffices, turnover, projects/clients of the company.
    
    
  • Letter from your current client stating your current work experience
    
  • Initial job offer letter
    
    
  • Copy of I-129 petition
    
    
  • Copy of the LCA (Labor Condition Application) approval
    
    
  • Current resume
    
    
  • Last few pay stubs
    
    
  • W-2 and tax returns for prior year
    
    
  • EAD Card
    
    
  • Company profile. If unavailable, take printouts of the company information from their web site. You can do this for your previous employers as well.
    
    
  • Copy of the labor certification and/or I-140 approval notice if you are beyond 6 years on H1
    
    
  • Original descree transcripts and education evaluations, if any
    
    
  • Prior work experience letters
    
    
  • Education evaluation
    
    
  • Photos of your current employer showing cubicles, nameplates of the company etc.
    
    
• H4
  In addition to the documents mentioned for H1B, following additional documents are required:
  • Marriage certificate
    
    
  • Copy of spouse's passport
    
    
• F1 to H1B
  • Form I-20
    
    
  • All requirements mentioned under H1B visa
    
    
• H2B
  • The original approved Notice of Action Form I-797, and its copy for every 10 workers.
    Samples: New H1, Extension
    
    
  • Copy of I-129 petition
    
    
  • Fax in advance a copy of the approved petition (I-797) and a list with the names of workers, including any substitutions and reasons explaining the substitutions. Fax must be sent to the consulate's appointment coordinator.
    
    
• F1
  • Original Form DS-158
    
    If you make an online appointment, you will be able to fill out all the details of this form online and print it out from your computer.
    
    
  • Form I-20
    
    
  • Before the appointment date, all F, J, M visa applicants must have confirmation from the sponsoring institution (such as school, program exchange organization, etc.) that your name and your dependents' names, if applicable, have been added electronically to the SEVIS (Student and Exchange Visitor Information System). The confirmation must also address your acceptance in the school or exchange program. Visas can't be issued until your data appears in SEVIS system.
    
    
  • F-1, M-1 and major of J-1 applicants must pay additional $100 for SEVIS fees, made payable to the Department of Homeland Security (DHS), before the issuance of the visa. You can pay online at FMJFee.com with a major credit card.
    
    You must carry a proof of payment of the SEVIS fee to the interview.
    
    
  • Evidence of financial means to pay for the costs of the program. Actual documentation may vary, but it can be documentation from the institution verifying that the program has been paid for, bank account statements, letters from sponsors or the parentsparents, etc.
    
    
  • Letter of admission to the program
    
    
• F2 to F1
  • Marriage certificate
    
    
  • Copy of your spouse's I-20
    
    
  • Your spouse's recent pay stubs, if any
    
    
  • All requirements mentioned under F1 visa
    
    
• H4 to F1
  • Marriage certificate
    
    
  • Your spouse's recent pay stubs
    
    
  • Copy of your spouse's H1B approval (Form I-797), I-129, LCA
    
    
  • Employment verification letter from your spouse's employer
    
    
  • All requirements mentioned under F1 visa
    
    

• Social security card
  
  
• Business cards
  
  
• Driver's license
  
  
• Marriage certificate and marriage invitation card, if any dependent spouse is applying for a visa based on the marriage
  
  
• W2's
  
  
• Proof of US address (pay stubs, utility bill, driver's license, etc.)
  
  
• H1B
  • Photos of your workplace
    
    
  • Company brochure or print outs of company web pages
    
    
  • Description of your job duties (brief and simple, not technical)
    
    
  • Recommendation letter from your supervisor
    
    
  • Information about your company's clients
    
    
• F1
  • Proof of proficiency with the English language
    
    
  • Recommendation letters
    
    
  • Bank statements
    
    
  • Assistanceship letter, if any