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North America Immigration Law Group (Chen Immigration Law Associates) is a U.S. immigration law firm dedicated to representing corporations, research institutions, and individuals from all 50 U.S. states regarding I-140 immigration petitions. We specialize in employment-based immigration petition and have a proven record of high success rate for the categories of:

We keep close track of the latest immigration trends and regulations of USCIS (U.S. Citizenship and Immigration Services), decisions of AAO (Administrative Appeal Office) and judicial review opinions. The massive collected material contributes to the winning strategies for our clients' cases.

Approval of each case is the goal of our law firm. The key to our success is how we present supporting evidence and the high-quality petition letters based on systematic knowledge and comprehensive database developed by our firm. To provide the best immigration service, North America Immigration Law Group only hires attorneys with J.D. degree from top law schools.

We have one hundred percent confidence in our capability to successfully represent our clients, and we are the only U.S. immigration law firm with refund policy on I-140 petition. This is not an empty guarantee but specifically laid out in the attorney-client contract and is binding on our law firm.

We are pleased to announce that North America Immigration Law Group has so far received over 5,000 EB-1A, EB-1B and EB-2 NIW approval notices. In 2014 and 2015, the approval rate is 98.22% for cases using our Approval or Refund® (money back guarantee) service and 96.95% for all kinds of services.

For NIW cases, the approval rate is 99.18% for cases using our "Approval or Refund®" (money back guarantee) service and the overall approval rate for all NIW cases is 98.47%.

For EB1A cases, the approval rate is 97.25% for "Approval or Refund®" (money back guarantee) service and the overall approval rate for all EB1A cases is 95.27%.

We are one of the leading U.S. immigration law firms providing the most comprehensive services for EB-1/NIW petition with a large volume of approval cases and high approval rate.

*The number of approval notice for EB1B cases is under-estimated of the total EB1B cases we successfully petitioned because many EB1B employer petitioners did not submit G-28 and we are not the attorney on the record.

*Our approval rate is 98.47% for all NIW cases and 99.18% for "Approval or Refund®" (money back guarantee) NIW cases.

*Our approval rate for all EB-1 cases is 95.36% and 97.21% for our "Approval or Refund®" (money back guarantee) EB-1 cases.

*The approval rate statistics only include cases that were originally filed by our law firm and exclude RFE (Request for Evidence)/NOID (Notice of Intent to Deny) cases that were taken over in the middle from other law firms or DIY clients.

*In 2015, all our EB1B denials and many of our EB1A denials were issued by the same immigration officer working in Nebraska Service Center. This officer holds a significantly different adjudication standard from the rest of the officers. Without exception, the officer firstly issued a generic template NOID (Notice Intent to Deny) or RFE (Request for Evidence ) without addressing specific evidence submitted or raised specific challenges. After our response, the officer issued another template denial, without addressing any information in our RFE/NOID response.

*Most of the denied NIW cases are from the same immigration officer working in Texas Service Center, who, similarly, always issued template RFEs (Request for Evidence) and denials without addressing evidence submitted. Clients with similar credentials as those in the denials were able to get approvals from other officers.

Client Testimonial

  • Assistant Professor of Information Systems

    It was a great experience working with the Chen Immigration team. They worked on my I-140 EB1B case with premium processing. The team was highly professional and always responsive. My case was approved in a short span of 3 months from the time the team started working on my case. I did premium processing and the approval came in 11 days from the time of application.

    Chen's team was always available for any kind of questions and concerns. The responses to any of my queries/concerns were received within a few hours (generally 2-3 hours was average). I highly appreciate such quick responses to questions that can be very complex sometimes and were specific to my profile. It was always clear during the entire process what the next step is and when I should expect to hear from the team. They use 10 day timer for preparing various aspects case materials, which again are very useful since it becomes easier to understand when and what to expect next. Given the complexity of the i-140 filing process, this is very important. They have an online system that is used for the entire process (any document sharing, messaging, and communication). I did not feel the need to call their office since all questions were handled efficiently through the system. I highly recommend Chen Immigration Law Group. Many thanks for all your help.
  • Amazing experience working with Chen Immigration Law Group. I just got my I-140 approval notice today. Very happy and excited! Chen's team is very efficient and accurate in providing information. Also, very responsive and fast which makes this stressful process to be sort of pleasant. I'm happy and satisfied with working with them, and I HIGHLY recommend anyone taking this route to get help and support from Chen's professional and experienced team.

    THANK YOU Chen team for all of your help.
  • University of Texas at El Paso
    Research Associate

    I applied for I-140 in the EB1A category on 16th Sep 2016. I got my case approved today without any RFEs within a week after my request for PP. This was a great experience for me working with North American Immigration Law Firm. I have also opted them for my I-485 filing. They were very helpful and answered all my queries in time. During all this preparation of my case, I never had to physically call them to talk. Every query of mine was answered timely using their web portal. They prepared my case very well right from the recommendation letters to my petition letter. I appreciate their effort in gathering all the stats and numbers regarding my journals, publications etc., for preparing my petition letter. I also appreciate their fast responses to the changes that I requested to my petition letter. The only major work on my side during the process was to compile all of my research achievements, which took a lot of time. They were very professional in handling my case and also gave me the assurance of 'Approval or Refund', which helped me in getting confidence in approval of my case. I would definitely recommend them for those wishing to apply for their green card.
  • Texas A&M
    Assistant Research Scientist

    I received the news of my EB1 I-140 case approval on tuesday. The case went through without any RFEs within 7 working days after they received my request for PP. My experience to work with the North America Immigration Law Group was very satisfactory. They prepared all documents and answered all my questions in timely manner and were very careful and knowledgeable in their responses. During the whole process the only stressful part for me was to write about my research summaries and achievements but after that everything seemed very easy due to their professional experience and hard work. The petition was flawless with very well thought arguments. Also their "Approval or refund" guarantee kept my confidence in their sincerity since they also had a lot at stake. Overall they worked very sincerely and with the help of their high quality and hard work they delivered as they promised. You guys are the best. Thank you so much Victoria Chen and team.
  • Baylor University
    Postdoctoral Research Associate

    I just received approval notice of I-140 for my EB1-A without any RFEs. I really don’t have any words to explain my experience working with the North America Immigration Law Group. I am completely satisfied. They answered all my questions. The team is very responsive, professional and thorough. I practically did nothing except writing research summary and achievements and list of references for them. That’s it. Then they did everything for me. The things which amazed me most was their writing skills. The draft of recommendation letters and petition letter were all so perfect. Overall they are truly best and now I know why all my friends and colleagues (who used WeGreen for their EB1-A) recommended me WeGreen. I recommend now everyone to use WeGreen for their immigration purpose. Thanks a lot WeGreen.
  • A heartiest THANK YOU to the attorneys! I recently received EB1A approval. During the preparation process, attorneys gave me valuable advice, addressed my questions, and were really thoughtful and disciplined. It is truly an amazing experience.
  • Same as the other 3000+ people below, I want to give thumbs up to the North America Immigration Law Group. They did an excellent job preparing my EB-2 NIW case. My petition just got approved without any RFEs. The team at Wegreened was very responsive, professional, and thorough. I really appreciate their help and will gladly recommend them to anyone who needs to file an employment-based petition.
  • I just received approval notice of my I-140. I cannot really say Chen and associates how much I value their excellent work. I would like to say a big thanks to North America Immigration Law Group's service during this entire process. My sincere thanks for each all your recommendations, for letters you drafted and for all your help over all. you are a very professional and expert group of people and i recommend you to everyone applying for permanent residency
  • Broadcom
    Staff Scientist

    The NAILG helped me in my EB-2 NIW application process. I was not confident with my case as my citation number is not great. NAILG helped me strengthen my case and their response to my questions is very prompt and detailed. Although the wait at USCIS was long (8 months) my I-140 was finally approved without any trouble! The team at NAILG are super professional. They are very thorough and covering all bases, and always on top of every aspect of the application. I believe the process would not have gone so smoothly without their help. Top notch service! I would highly recommend them to everyone I know who need NIW filing. THANK YOU North America Immigration Law Group!!!
    Postdoc Research Associate

    Thanks for the professional job done by Wegreened. From my successful story on EB1A application, I would say I am the expert in my own field, however wegreened team are the experts who can help you to figure out how to get your case approved in a professional way for sure. I would highly recommend people to get suggestion from wegreened and collaborate with them to get your immigration case approved.

    Z. L.
  • University of Pittsburgh
    Neurosurgery Resident

    The experience working with the North America Immigration Law Group was nothing less than excellent. I wish there was more than a superlative word that I could use to describe my satisfaction working with this firm. Thorough professionalism, reasonable cost and extremely cost-effective. Having talked to so many friends in similar situations as mine, working with different law firms, my experience was better than almost all of my friends not working with WeGreened. I got both my EB1A and NIW petitions approved. There was not a single question I asked which was not correctly and promptly answered. I have NO QUALMS recommending this firm to anyone who is looking to get a green card. HANDS DOWN, the best there is--North America Immigration Law Group, THANK YOU!
  • Yale New Haven Hospital
    physician scientist

    I am grateful for the help from Chen Immigration and Attorneys Group with the final approval of my EB1A I-140 petition. Their instructions on document preparation are crystal clear and responses to my questions are fast and superb. This success is crucial to my career. It is not possible without Ms. Chen and her excellent team.
    SCOL fellow

    I would love to deeply thank North America Immigration Law Group for their great work on my I-140 application with pp service. Especially Ms Chen, for her kind and professional work for me. She did an excellent job for dealing my case. My case was approved only 4 days after the NSC received the case application. Highly recommend this group. Thank you very much~
  • medicine

    I wanted to thank North America Immigration Law Group, also known as Chen Immigration for their excellent work on my application for green card through NIW/EB2. I am in medicine and had about 17 publications at time of application. She did an excellent job preparing my case. They are so precise and professional. Highly recommend this group. Thank you again.
  • Postdoc fellow

    The NAILG helped me in my EB-2 NIW application process. Although the wait at USCIS was long and ardous (9 months) my I-140 was finally approved without any trouble! The team at NAILG is brilliant, they are very diligent about being thorough and covering all bases, and always on top of every aspect of the application. The recommendation letters and the petition letter were very well written and on point. I was always able to get clarification on my questions quickly. I believe the process would not have gone so smoothly without their help. Top notch service!
  • University of Minnesota

    I have applied for EB-1B through North America Immigration Law Group. I have got the approval in 8 days of filing my application (premium processing).

    North America Immigration Law Group is a highly professional firm. They are very meticulous and stick to the time lines. Their expertise can be clearly seen in each and every interaction with them.
    They have done an excellent job in everything from Writing the recommendation letters, choosing the recommenders, to writing the final petition.

    I am extremely happy with the out put as well the whole process.
    I would highly recommend them to all those looking to apply for a green card.

  • I applied for EB-2 trough North America Immigration Law Group. I got the I-140 approval in one month ! I would like to greatly appreciate for their professional jobs. According to my interaction with them in filling out the I-140 application during several months, I found them very trustful and expert. Therefore it is my pleasure to highly recommend this firm to persons who like to apply for EB-2 green card or related ones. In addition, the application fee is cheaper that other immigration attorneys. Thanks a lot
  • North America Immigration Law Group is really professional and outstanding group of attorneys that I admired and appreciated their work from the beginning.
    Before choosing this law firm I contacted many lawyers to evaluate my CV and give me idea about the details of green card application. The professional and comprehensive comments of this firm persuaded me to decide that this firm is the best for me as a particular (or picky) person!
    They drafted extraordinary and impressive letters of recommendation, petition letter, and answered my boring question during whole process. After I got RFE from USCIS because of the few number of my citations, this firm supported and helped me to prepare very strong and persuasive documents. Two weeks after submitting our response to USCIS, we got approval for my NIW/I-140 that was fantastic news for me. As a scientist, green card will enable me to get federal funded grants and many other opportunities and benefits.
    I really appreciate their great and successful work in my application of I-140.
    I always highly recommended this firm to my international friends and will always recommend them.

    Thank you very much.

  • Thank you so much for your support and guidance in getting this approval. I could not have done it without your help.
  • Rice University

    Thank you for your great work in my case. You have conducted this process in a very well structured manner and I have received the approval of my I-140 petition in just 4 weeks. You are highly professional and absolutely reliable. The guidance that you provided during the preparation of the case as well as how my case was presented by you showed to be highly effective to successfully complete this process. Your rapid response to all the inquiries during the preparation of my case is greatly appreciated. A friend of mine recommended North America Immigration Law Group to me, and in the same way I will recommend your Firm to my friends and colleagues, so they can navigate this process as smoothly as I did.

    Many thanks,


Success Stories: Engineer in California with 133 Citations to His Electrical Engineering Research Obtains an EB-1A Petition Approval without RFE

Thank you for bringing us the exciting news! It is amazing to get the case approved! It was really nice to work with you. I will share the experience and recommend you online. Thank you again.

Approved in 17 days

State of Residence: California

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Success Stories: EB-1A Petition Approved Without RFE for Postdoctoral Fellow from China Who Had Been Cited 137 Times in the Field of Pharmaceutical Science

I am happy to inform that my I140 was approved. [...] Thanks for your help.

Approved in 79 days

State of Residence: North Carolina

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Success Stories: Hematology and Oncology Fellow from India with 78 Citations in the Field of Medical Research Receives NIW and EB-1A Petition Approval (No RFE Issued)

You are amazing. One of the best news we had recently.

Approved in 20 days

State of Residence: Michigan

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Success Stories: Postdoctoral Research Associate with 147 Citations in the Field of Metallurgical Engineering Attains EB-1A Petition Approval (Without RFE)

Thank you very much for all your assistance in this process. Although it was a long wait, it ended well.

Approved in 363 days

State of Residence: Texas

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Success Stories: EB-1A and NIW Petitions Approved (Without RFE) for Postdoctoral Researcher in Pennsylvania with 143 Citations in the Field of Molecular Biology

It is such great news! Thank you so much for your help!!! [...] You provided me lots of help during my I-140 case preparation and I really appreciate that!

Approved in 161 days

State of Residence: Pennsylvania

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Success Stories: Theoretical Physics Research Associate in Wisconsin with 115 Citations Obtains an EB-1A Petition Approval After NAILG Successfully Responds to the RFE Issued

Chen immigration team has an unquestionable expertise in handling immigration related issues, especially regarding the permanent residency. I heartily recommend this law firm to all my colleagues. Thank you!!

Approved in 76 days

State of Residence: Wisconsin

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Success Stories: Chinese Postdoctoral Fellow in the Field of Food Microbiology Receives EB-1A Petition Approval with 119 Citations and 10 Publications (PP Without RFE)

Thank you for telling me the good news. I am impressed by your expertise and attitude throughout the application process. [...] Thank you again for your service and help!

Approved in 11 days

State of Residence: N/A

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Success Stories: 6 Days after Filing, EB-1A Petition is Approved for Postdoctoral Associate in Texas in the Field of Neuroscience

Thanks for your excellent work! I have recommended your company to several Chinese and Indian colleagues and friends. [...] Thanks again!

Approved in 6 days

State of Residence: Texas

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Success Stories: Postdoctoral Associate with 129 Citations in Virginia in the Field of Medicinal Chemistry Receives EB-1A Petition Approval a Year after Filing

Thank you very much for your professional and efficient assistance. I will definitely refer my friends who plan to file the green cards to your firm and will also recommend your firm on Mitbbs, since I got to know your law firm from Mitbbs. I already retained a lawyer before paying additional attorney fee to hire your law firm. Judging from the result, I finally got my money's worth. Lol. Thank you again!

Approved in 369 days

State of Residence: Virginia

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Success Stories: EB-1A Petition Approved in One Week for Diagnostic Medical Physics Resident in Minnesota in the Field of Medical Physics with 129 Citations

Thanks very much!

Approved in 7 days

State of Residence: Minnesota

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Success Stories: Pennsylvania-based Research Scientist in the Field of Molecular Biology Who Was Cited 98 Times Receives EB-1A Petition Approval

Thank you so much for the great news. :) [...] It has been a long wait but I am very delighted with the final approval. I sincerely appreciate your hard work, valuable advice & sheer dedication to my case. You are the Best Immigration team one can have and I will surely refer you to my colleagues & friends.

Approved in 209 days

State of Residence: Pennsylvania

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Success Stories: One Week after Filing, Employer-Petitioned EB-1B Is Approved for Research Associate in Ohio in the Field of Diagnostic Pathology

I am happy to work with you and will definitely refer my friends to you.

Approved in 7 days

State of Residence: Ohio

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Success Stories: Our Firm Helped a Postdoctoral Research Associate from India in the Field of Computational Science Obtain an EB-1A Petition Approval in 6 Days

The North America Immigration Law group has excellent skills to draft recommendation letters on behalf of the professors/scientists. Their drafted petition letter was outstanding and covered every component that is relevant to display my contribution to computation physical science. I strongly suggest using their help for the I-140 application.

Approved in 6 days

State of Residence: Washington

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Success Stories: EB-1A Petition Approved by Nebraska Service Center for Chinese Postdoctoral Researcher with 145 Citations in the Field of Pharmaceutical Science

Thank you very much for all the effort for my I40 case. I already recommended Chen Immigration to my friends. One of my friends signed a contract with you last year and her I140 Eb1b case just got approved last month. My [other] friend is considering to have your help with her eb1b soon. Before I decided to apply EB1A, I consulted different law companies and most of them recommended me go with NIW instead. However, WeGreen Law group was very supportive and agreed to file EB1A for me. All staff from Chen Immigration work very efficient and professional. You treated my case very seriously and did a very good job on understanding my work and drafting PL and recommendation letters. My citation and reviews are not as many as others', but the lawyers worked really hard to highlight my achievement. I will highly recommend you to everyone I know!

Approved in 209 days

State of Residence: Washington

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Success Stories: NIW Petition Subsequently Approved 13 Months after Filing for South Korean Petitioner in the Field of Biomedical Engineering

I really appreciate your expertise and hard working. It wouldn't be possible without your help.

Approved in 398 days

State of Residence: Florida

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