This invoice is one that has been matched; has a valid budget status; and is posted. A voucher need only have valid budget status to be recorded in KK.
Letter of transmittal contains payment instructions transcribed on UNDP letterhead; the letter is signed by two authorized signatories and delivered to the bank for execution.
The difference between current assets and current liabilities. In the specific context of UNDP, this shall normally be taken to mean the sum of working capital and reserves.