The H1B Visa Program is the official and primary USA work visa / work permit. The H1B is a non-immigrant visa in the USA under the Immigration & Nationality Act, section 101(a) (15)(H). It allows US employers to employ foreign workers, from all over the world, in specialty occupations.
The US Government introduced the H1B visa to provide highly skilled International Professionals and/or International Students, from all over the World, the opportunity to live and work in America.
The H1B is the most sought after US work visa and US Immigration requires 'every' foreign national to obtain a visa in order to legally work in America.
Go through the offer letter thoroughly. Make sure that you understand everything about your job offer. Don't hesitate to confirm anything you are confused about.
Don't get carried away with verbal assurances, make sure all the promises are in writing. Once you land in USA and sign the employment agreement, employer may refuse to provide these benefits.
Don't ever give your original passport.
Don't ever submit any of your original mark list or any degree certificates.
Don't submit your original H1 approval/I-94 to your employer.
If you are asked to sign any agreement, ask for the copy of the agreement. Read carefully before you sign.
There is no legal term/policy such as bench period. You should be paid from the day one, whether you are in assignment or not.
** Make sure there is no such catch in your offer letter or in the employment agreement.
Ask for the written copy of the employment policy(HR policy). Most of the companies never give full details about any policy. Understand your rights. Don't reply on verbal agreements.