I am working with employer A and my I-797A with employer A is valid till July 2016. I got an offer with another employer, say employer B. I got H1B approved with employer B. I-797A with the employer B is valid till May 2017. However I am not planning to join with employer B and still working with employer A.
The latest I-797A is with employer B and it is never used, i.e. never worked with employer B. I just have a soft copy of I-797A from employer B, don't have other petition document. The employer didn't share the hard copy of documents.
I got another job offer now from employer C. I am planning to join employer C. Which H1B document should I give as a reference for apply H1B with employer C? Is that the H1B with employer A or B