> For the complete documentation index, see [llms.txt](https://docs.payments.thalescloud.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payments.thalescloud.io/perso-design-services/implement-image-validation-services.md).
# Implement Image Validation Services
## What is Image Validation?
Before they can be printed to a payment card during perso, all card designs created that include end user content, for example uploaded images or sketches designed by the end user, require checking for compliance to both scheme and issuer requirements for card images. This process is called image validation or image checking.
Image validation needs to be considered before a card order can be placed by the issuer, and can be done by the issuer through the Perso Design Services Administration Dashboard or via the Thales Image Checking Service.
## What is the Thales Image Checking Service?
The Thales Image Checking Service enables issuers to outsource the image checking process to our expert team of Image Checkers who are trained on the image checking process and have many years of experience with making image checking decisions.
Our team are well-versed on the latest popular culture themes, events and social trends to ensure image compliance. Where an image checking decision is ambiguous, the decision can be referred to a Senior Image Checking Manager to research further and make a decision. All image checking decisions can be audited via the Administration Dashboard.
Image Checking decisions are subject to the SLA as defined when setting up the service with Thales.
## Image Checking Flow
## Default Image Checking Rules
**Thales has compiled a list of 23 default image checking rules to ensure compliance with scheme and issuer requirements. We work with issuers to define any further specific rules that they require, however some examples include:**
1. Copyrighted materials or licensed content;
2. Advertising, promotional material;
3. Celebrities;
4. Meme and viral content, etc.
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