How can I create automatically an invoice in AP from an invoice in AR?

Hello

Nowadays my client has a process call "débitos cadena" in which its customer pays the invoice with a certicate of debito cadena ( it represents the logistic expenses which will be pay by my client).

So then, my client need to create a invoice AR because it need show the debt in the customer account and, also, it need to do the same invoice in AP because it needs to show the tax.

For that, I need to when I create the invoice in AR, automatically create an invoice in AP.

I hope to have been more clearly.

Regards.