Per-Piece Attribution Strategy

Use one QR code per mailing type — not one QR for the entire campaign. If you are mailing 4 different mailer designs (postcard A, postcard B, letter, insert), create 4 QR codes. Name them by piece: “Postcard A — HVAC May 2026.” This gives you scan volume by piece type — you’ll know which design converted best before the next print run.

SVG Format for Print Quality

Always download QR codes in SVG format for direct mail and any large-format print. SVG (Scalable Vector Graphic) is resolution-independent — it prints at perfect quality at any size, from a small postcard QR to a billboard. PNG files degrade at large sizes. Request SVG from your mail house or designer if they need it in a specific format.

Scan Volume Timeline

For standard USPS mail campaigns, expect this scan distribution after pieces are delivered:

• Days 1–2 — Low scan volume, earliest piece deliveries
• Days 3–7 — Peak scan volume. This is the primary response window.
• Days 8–14 — Declining scans, late deliveries and delayed opens
• Day 14+ — Residual scans only. Launch a non-responder re-engagement campaign targeting contacts from the same geographic area who did not opt in.