An invoice approval should name the invoice number, vendor, amount, currency, purchase or contract reference, and payment destination being authorized. The reviewer should see the supporting order and the outcome of the total check. Separate the person who enters payment details from the person who approves them where the workflow allows.
If bank details change, verify them through a trusted channel before approval. A rejection should specify the discrepancy and return the invoice for correction. Keep the approved version and timestamp; if the invoice changes afterward, repeat the relevant checks. Never treat silence as approval. FTC advice for businesses stresses clear procedures for approving purchases and invoices.
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