Configuration of APP

Hi SAP guru;s,

I have problem regarding APP configuration.

when we configure APP that time 1 option is ther called "Paying Co. Code". i give example reg it plz explain me.

I have two co.code 1000 and 2000.

1000 makes payment on behalf of 2000 while executing app through f110.

so from 1000 co.code bank balance is reducing than waht happen in co.code 2000 while executing APP.

Regards,