Hey folks, I’m a researcher from abroad planning a short 2-week visit to a US university for some collaborative work. I’m not getting paid by them or anything—it’s all funded by my home institution. The J-1 visa seems super complicated and hard to get without US sponsorship, so I’m thinking B1/B2 might be the way to go. What type of visa should I apply for as an alternative? Also, what documents do I typically need, and any pro tips to boost my approval chances? My trip is in a couple of months, so time is ticking! Thanks in advance!
Hi Dmitri, yes, B-1 is the go-to for unpaid research visits. Required docs usually include:invitation letter from the US institution detailing the purpose and duration, proof of funding (bank statements, sponsor letter from your employer), your itinerary, ties to home country (job letter, family, etc.), and a valid passport. Be thorough—sloppy apps get rejected. What’s your field of research, if you don’t mind sharing?
Oh, I remember helping a colleague with this last year. To increase approval chances:Show strong ties to your home country—like property ownership or a full-time job you’re excited to return to. Also, get a detailed invitation letter; it makes a big difference. Avoid any hint of immigration intent. Safe travels—sounds like an amazing opportunity! 
Hey man, B1/B2 should work fine for your short stint. Just don’t plan on getting paid in the US, as that pushes it towards J-1 territory. Documents-wise, add your DS-160 confirmation and pay that MRV fee. Tip:Practice your interview answers to show it’s purely temporary. How long have you been in research?
Hey, @dmitri_code for a 2-week unpaid visit funded by your home institution, B1/B2 is usually the right choice, not J-1 
You can use a B1/B2 for short academic visits, meetings, seminars and collaboration as long as you’re not getting paid by the US side. To strengthen your case, carry:
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Invitation letter from the US university (dates, purpose, no US salary)
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Letter from your home institution (your position, they fund the trip, you must return)
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Proof of ties & income (salary slips, bank statements, contract/enrollment)
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Rough travel plan + return ticket
At the interview, keep it simple: short 2 - week academic visit, fully funded by your home institution, and you’re returning to continue your job/studies. That’s what convinces them more than a big stack of papers 
From my experience in IT research visits, B-1 has worked well. Key docs:Proof of non-immigrant intent is crucial. Tips:Be honest in the interview, dress professionally, and have all papers organized. If they ask about staying longer, firmly say no. Best of luck—innovation knows no borders!