- Tile size, boxes and coverage
- Tiles are quoted per square foot but sold in boxes. Printing size, pieces per box and coverage per box lets the buyer verify the area against the room measurement.
- Shade / batch number
- Tile shades vary between production batches. A batch or shade code on the invoice ensures replacement boxes ordered later match what was laid.
- Model and series
- WCs, basins and faucets have model numbers that decide fitting compatibility and warranty. Builders' specifications list them, so they belong on the line.
- Grade (premium / standard / commercial)
- Tiles come in first, second and commercial grades. Grade affects price and is the first thing checked when a customer complains about chips.
- Breakage and return terms
- Showrooms accept unopened boxes back within a period. Stating return terms on the invoice controls disputes when surplus tiles come back.
- Site address and floor
- Deliveries to upper floors carry lifting charges. A site address and floor note on the invoice prepares the delivery crew.
- Architect / designer reference
- Showrooms often pay referral fees to architects whose clients buy tiles. Tagging the designer on the invoice keeps the referral record straight and separates it from any discount given to the buyer, which is what reduces taxable value.
- Pieces per box and wastage allowance
- Builders order extra for cutting wastage, usually 5 to 10 percent. Noting the wastage allowance on the invoice explains why billed area exceeds the drawing area when the client's quantity surveyor checks the bill.