Prepayment and sales invoice clearance and reporting

Clearance and Reporting
1

I have two questions:

  1. Is the sequence of submitted sales invoice IDs (1, 2, 3, etc.) important for ZATCA compliance?

  2. If the invoice is already paid by the customer and the delivery will happen after one week, we should submit a prepayment invoice to ZATCA. The second invoice will have a zero amount. My question is: can we skip sending the second invoice to ZATCA?