> For the complete documentation index, see [llms.txt](https://help.openletterconnect.com/olc-help-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.openletterconnect.com/olc-help-docs/mailing-and-delivery/why-some-postcards-arrive-smudged-or-marked.md).

# Why some postcards arrive smudged or marked?

**Short answer:** USPS processing can scuff or smudge postcards during high-speed sorting and transport. This is common across the industry and does not indicate a printing defect.

#### What you might see

* Light gray or black **rub marks** or streaks
* **Scuffing** or small scratches on coated areas
* Minor **toner lift** where rollers made contact
* **Inkjet spray or barcodes** printed over artwork
* Occasional **corner nicks** or edge wear
* Rare cases of **surface “burn” marks** from friction heat

#### Why it happens

* **USPS high-speed sorters** use belts, rollers, and metal gates that physically contact each postcard to move and route it. Contact creates friction and can abrade the surface. 
* **Friction and heat** in the mailstream, plus stacking in bins, add minor wear. 
* **Barcode and cancellation spraying** can land on the front image depending on orientation. 

#### What OLC controls

* We print on **production-grade digital presses** with calibrated color and quality checks per batch.
* We handle, package, and tender mail to USPS following USPS operational standards. Once USPS accepts the mail, it enters its automated network. 

#### What USPS controls

* The end-to-end movement through sorting equipment and carrier handling.
* Local facility calibration and throughput, which can vary by plant and day.

#### How to reduce visible marks on future campaigns

* **Design for the journey.** Avoid large solid dark areas in critical spots since rub marks are most visible on heavy coverage. Keep key text away from likely contact paths and barcode zones. 
* **Allow safe areas.** Keep must-read content and CTAs clear of edges and postal indicia zones where equipment engages. 
* **Consider envelopes** for VIP audiences. If pristine presentation is critical, mailing in an envelope protects the piece during processing. Community and practitioner reports support this.