Print-Ready File Policy: What to Check, Fix or Reject at Upload

Customers send files in every state: a phone photo, a PDF from a word processor, a logo copied from a website. A file policy decides, before the first order, which of those files go to press, which ones your team fixes and which ones go back with a request. This checklist is part of the guide to design file formats for print, which explains the formats themselves.

The policy below is written for the owner of a print store, not for the designer who makes the file. For the arithmetic behind resolution, see the table of minimum pixels for common print sizes.

What does a print-ready file policy cover?

A print-ready file policy covers the rules a customer file must meet before printing and the action your team takes when it does not. The rules are file type, size, resolution at print size, bleed, safe area, colour mode, fonts and transparency. The actions are three: accept, fix in house, or decline with a reason and ask for a new file.

The policy has two readers. The customer needs the rules where the upload happens, in plain words: "PDF with 3 mm bleed on every edge, 300 DPI at print size". Your team needs each rule as a check with a pass or fail, so two people looking at the same file reach the same decision. The twelve checks of the checklist at the end of this article give both.

Industry standards help with the vocabulary. PDF/X, published by ISO as ISO 15930, is a family of PDF profiles made for exchanging print files, with rules on colour, fonts and boxes such as the trim box and the bleed box. Many printers ask for PDF/X; others accept any PDF that meets their values.

Which checks should run when a file arrives?

The checks that should run on every file are the ones a machine can measure: document size against the product, effective resolution at print size, bleed, safe area, colour mode, transparency and, for PDFs, embedded fonts. Printcart's print file check runs these against a product profile and marks each issue as a Warning or a Must fix, so the team starts from a list.

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<a href="https://solution.printcart.com/insight/print-ready-file-policy-for-print-stores"><img src="https://solution.printcart.com/insight/print-ready-file-policy-for-print-stores/file-decision-flow.webp" alt="Five steps: upload with rules, automatic check, team decision, customer told, file to production" width="1440" height="1080"></a><br>Source: <a href="https://solution.printcart.com/insight/print-ready-file-policy-for-print-stores">Printcart</a>

The safe values most printers start from are in the table below. They come from the Printcart tutorial on preparing print-ready files; your printer's own specification wins wherever it differs.

Two limits are worth knowing. First, bleed can only be measured on a PDF: a JPG or PNG has no trim box, so the check reports bleed on images as not checked. Second, an automated check catches production problems but does not replace a proof, because it cannot know whether the design is what the customer meant.

Which problems can you fix and which must you decline?

A problem is yours to fix when the change is mechanical and leaves the design as the customer made it: a resolution slightly under the target, a plain background that needs extending into the bleed, an RGB file your press converts well. A problem goes back to the customer when fixing it would change the content, such as text in the cut zone or a photo far too small.

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<a href="https://solution.printcart.com/insight/print-ready-file-policy-for-print-stores"><img src="https://solution.printcart.com/insight/print-ready-file-policy-for-print-stores/fix-or-reject-matrix.webp" alt="Matrix of six file problems against three actions: fix in house, AI tool, ask for a new file" width="1440" height="1080"></a><br>Source: <a href="https://solution.printcart.com/insight/print-ready-file-policy-for-print-stores">Printcart</a>

Resolution needs a threshold, not a feeling. Printcart's Artwork Upscaler and print file check share one rule: a file at the required resolution is Good, a file from 80% of it is a Warning, and a file below that is a Must fix. A 2× or 4× AI upscale can close a gap in pixels, but it cannot bring back detail the photo never had, so review the result at 100% before printing.

Each decision should be the same whoever makes it. Write the policy as the table above, agree it with your printer, and give the team the right to accept a warning only after looking at the file.

How does a Printcart store carry out the policy?

A Printcart store carries out a file policy in three places: the upload rules of each product, the preflight check, and the file review in the dashboard. Upload rules refuse file types you do not print; preflight measures the file against the product; the review accepts the file or declines it with a reason the customer receives by email on paid plans.

1. Set the upload rules on the product. In WooCommerce, Enable Upload Design opens a tab with allowed and disallowed file types, the number of files, the maximum and minimum size, and a minimum resolution for JPG images. A file of a type that is not allowed is refused with a message that lists the allowed types.
2. Run the preflight check. On the WooCommerce order screen, Printcart Store 2.13.2 or newer runs AI Preflight on the order's print PDF and reports resolution, colour mode, fonts, bleed and transparency; it runs on demand or automatically when a new order lands on hold. The Printcart dashboard runs the same kind of full check on a PDF link.
3. Accept or decline the file. In the dashboard, Accept file approves the artwork and Decline stays disabled until you type a reason, for example "Image resolution is too low for printing (need at least 300 DPI)". On plans with review emails, the customer gets the reason and an Upload a new file button.

The checks inform your team; they do not block the customer's upload on their own, and the customer does not see the preflight report. That is a choice to keep: the customer can always order, and the file decision stays with people who know the press. The artwork upload and print-ready files pages show where these steps sit in a Printcart full store, and the AI tools page lists the preflight, upscale and background tools.

What should the customer see before uploading?

The customer should see the file rules on the product page before uploading: the file types you accept, the bleed in millimetres, the minimum resolution, the colour mode and the maximum file size. A downloadable template with the trim and bleed lines does more than any paragraph, and one sentence of reason, such as "bleed stops thin white lines at the cut edge", earns cooperation.

Keep the wording about the file, never about blame or billing. When a file comes back, the decline reason should name the value needed ("300 DPI at 10 × 15 cm needs 1,182 × 1,772 pixels") rather than a code. The more often that reason is precise, the fewer second declines you send. The WordPress print shop store and the business card printing store are examples of product pages where customers can upload their own files or design online.

For stores that want the checks set up for them, the AI print file preflight setup service connects preflight to the products, and customer service for the file decisions is covered in customer service for print orders.