K. Orawan, The contribution, as per AIT-EU Agreement is from "Beneficiary", I.e., AIT and from its partners (FAO and Oxfam). The Agreement does not talk about responsibility Centers. So Auditor needs to use word "Beneficiary" if he explicitly wants to mention about the AIT's contribution only! I also suggest him to use word 'contribution' instead of 'payment'. Documenting contribution of AIT only and not of partners also gives impression that Auditor is only verifying AIT and not partners. In fact they need to verify partner's contribution as well. Indeed, for this, Auditor needs to go beyond ERP system of AIT. He needs to verify other evidences (receipts, journal vouchers, time sheet, etc) of AIT and its partners.
As I mentioned earlier, based on the suggestion from donor, the Auditor needs to record all evidences irrespective of how they are placed in beneficiary's accounting system.