General parameters > Chapter Common Data > Parameter PIVSUP (Delete invoices) 

Use this parameter to authorize or prohibit the deletion of supplier Invoices (GESPIH) in the Purchasing module or Supplier BP invoices (GESBIS) in the A/P-A/R accounting module.

Yes - You can delete a supplier invoice as long as it has not yet been validated or posted.

No - You cannot delete suppliers invoices.

Level of localization/Global variable

This parameter is defined at the level Site.It belongs to Chapter TC (Common Data) and the Group INV (Invoicing rules),The following parameters are also associated with this chapter and group :

The global variable GPIVSUP is associated with it.

Functions concerned

The following functions are associated with this parameter :

 A/P-A/R accounting > Invoicing > Supplier BP invoices

 A/P-A/R accounting > Invoicing > Supplier intercompany invoice

 Purchasing > Invoices > Invoices