Pih(previous invoice hash)

XML and business rules
1

where will we use the Pih(previous invoice hash) ? or it will be static ?

2

Dear @AhmedTarekYA ,
Please note that the PIH for the first sent invoice from the EGS must be a “0” value encoded to base64. This sequence is associated with each device/PCISID onboarded, and after that, it will be the previous hash of the latest submitted invoice, whatever the type of invoice sent when using the same device.
Thanks

3

will it be used from zatca ? and what will happened if it is static each time ?

4

PIH should not be static value. PIH should be the Invoice hash value of previously submitted Invoice.