1. Not Prepared for the Interview
Preparing for interview can better equip and give you confidence in the interview. Researching and preparing well with for commonly asked questions and their correct answers will help a great deal in the interview.
2. Incomplete and Untruthful Information
This is very important as any incomplete/false information can lead to delay. False information can predict your future ability to apply for US visa. It may also cause legal actions against you.
3. Incomplete Documentation
All required documents must be carried along with complete and authentic information. Bringing and keeping your documentation in an organized way can leave a positive impression on the interview officer.
4. Not Carrying Appropriate Fee
The US consulate has strict payment methods. Make sure you are aware of the method and the exact amount of the fee. For example, US consulates use bank drafts for visa application and visa issuance fee and not cash.
5. Unnecessary Extra Information
Do not give information which you were not asked. People try to be over confident and over smart give out more detailed answers than is needed which may lead to additional related questions which may work against you.
Question: Why do you want to go to the US?
Wrong Answer: I want to see how USA is and if I like it I want to stay back with my son.
Preferred Answer: For tourism purpose and/or to spend some quality time with my son/daughter.
6. Inconsistent Information
Difference in the information you provide in the documentation and what you say during the interview can go against your case.
7. Arguing with the Consulate Officer
Never argue with the consulate officer. If you want information ask in a polite manner.
8. Having Poor Communication
Poor communication affect cases in a negative way. If you're not good in English, you should request for an interpreter.
9. Talking too much
You are the one being interviewed and not the interviewer. So, keep your answers brief and to the point. Speak only when you need to.
10. Appearing to be Nervous
Be confident because this can bring positive results. Especially, in cases where a consulate officer has to rely on limited information provided by you. Their decision is influenced by the way you react to questions, your body language, and how true your answers are.