What is the difference between Certification of Expenses Not Requiring Receipts (CENRR) and Reimbursement Expense Receipt (RER)?

The required supporting documents for the reimbursement/liquidation of expenses are differentiated as follows:

Certification of Expenses Not Requiring Receipts – expenses amounting to ₱300.00 or less purchased from / rendered by establishment not issuing receipts/invoice

For payments not exceeding 300.00 made to suppliers/ establishments not issuing OR/invoice, Certificate of Expenses Not Requiring Receipts (CENRR) is required. For payments above ₱300.00 but not exceeding ₱1,000.00 made to suppliers/ establishments not issuing OR/invoice, a Reimbursement Expense Receipt (RER) can be used in lieu of the OR/Invoice.

Reimbursement Expense Receipt – expenses amounting to more than ₱300.00 but not exceeding ₱1,000.00 purchased from / rendered by establishment not issuing receipts/invoice