All expenses should be substantiated by a receipt. For vendors who are unable to issue receipts, please get a written receipt signed off by the vendor and the endorsing organisation. Do get them to scan or fax them over. For invoices, please also attach the original payment receipt, or make sure the invoice is signed, paid and/or signed and stamped by the Vendor. All receipts/invoices should be properly numbered, dated and translated to English (if it contains foreign language) for easy reference to the Statement of Accounts. All original receipts/invoices of the project expenses are to be kept for 6 months and submitted to NYC for audit upon request.