Hello, I recently got job offer from two different companies in a span of one month. I already agreed to the offer from the first company and they have applied for my H1-b visa transfer. I have also received the receipt notice from USCIS. Now, I have another offer from a better company and I want to accept the offer. My question - Can two employers file for a visa transfer at the same time? And, also can there be any legal obligations if I say NO to the first company after they have filed my visa transfer?