How to reserve amount of the invoice in AP ?

Summary

How to reserve amount of the invoice in AP ?

Content

Business case:

We deal with our suppliers in a way that we reserve 10% of each invoice and pay only 90% of the invoice and when they successfully accomplish the project, we get them all the 10%s in out payment after 3 months of the final delivery 

how can we do that in Oracle Cloud R13?

Example

AP Invoice 

Invoice #123 original amount $10,000 

we scored 10,000 in the header 

in the distributions, we want to split the amount by 2 lines 

line #1 9000 (will be paid to the supplier)

Line #2 1000 (will be reserved to the supplier)