I believe the job offer letter the consulate accepts is the offer letter that you receive when the company actually offers you the job.
It is the letter specifically between you and the company that states:
- what the job title is
- start date for the job
- the salary and benefits
- contains a space for a signature in which you have to sign and return to the company saying that you have accepted the offer.
This is how a typical job offer letter is.It is not the generic letter sent about a prospective job. Hope this helps.