Triangulation VAT, recorded on AP transactions??

By default, when selling to a registered EU supplier, I will either set the tax solution to calculate an EU Sales Goods, EU Sales services or an EU Sales Triangulation tax rate – all with a 0% rate but often with different parameters to allow me to report them differently. On the flip side, when receiving an invoice from a supplier, i would only split between the purchases from Europe of goods and services. But a client of mine recently has insisted that for invoices received from suppliers they need to record separately the tax rate when the supplier charged triangulation tax.

Is this the norm? is this a legal requirement? what countries would need this if it were a legal requirement as my client is located in Spain.

your comments will be greatly appreciated