Visit visa from Pakistan - Question about Etimad checklist

Dears I want apply for 2 year multiple visa from Pakistan, and in the new checklist it is mentioned Return ticket is required and need some clarification about following points, if both are same?

i. Electronic invitation الدعوة خطابات issued by the Saudi Chamber of Commerce and industries will be valid only for one month from the date of issue.
ii. Visa slip by MoFA

Thanks

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