First of all, employment letter is required for only principal applicant and u need only one job duty letter which will contain below:
According to requirements they want:
Letters must be
· Written on company letterhead,
· Signed by responsible officer/supervisor,
· Have the printed name and title of the responsible officer/supervisor beneath the signature,
· Show the company`s full address, telephone and fax numbers, e-mail and website addresses,
· Stamped with the company`s official seal (if applicable)
Letters must include all of the following information:
· The specific period of your employment with the company,
· The position you have held during the period of employment and the time spent in each position,
· Your main responsibilities and duties in each position,
· Your total annual salary plus benefits, (must include your salary)
· The number of hours worked per week. (must include your no of work hours per week)
So there is no need of adding any extra doc ....
And for the ur ref. following docs are suggested to send:
Work experience requirement:
1. Job duties on Company Letter head.
2. Full time /Working hour should be mentioned.
3. Company's seal if applicable
Additional:
5. Appointment/contract letter
6. Payslip (3 months will be enough)
7. Business card of applicant and referee (reference letter's).