Hello, I would like to apply for charity work...

To obtain a work visa , you must obtain a work contract, and then go to the Embassy , and apply for a visa,
The application shall be accompanied by the following documents:
1) Copy of a valid passport for at least six months 
2) Two photographs with the same specifications of passport photo with white background for each
3) booking flight
4) Copy of the contract of employment or letter of employment

The procedures for obtaining a work permit in Bahrain begin by submitting the following documents to the Bahrain Ministry of Labor by the employer, which may be a company or contractor ​to obtain a work visa:
- Fill out the application form for obtaining a work visa in Arabic.
- A copy of the company's commercial registry;
- Labor immigration card;
- A copy of a valid employment contract between the employer and the employee or worker
- A copy of the employee's or employee's passport
- 4 passport size photos
Once the employer obtains the work visa, he must send a copy to the employee and then present the original copy at the employee’s arrival airport before the employee’s arrival in Bahrain