diff --git a/modules/primer-cards/README.md b/modules/primer-cards/README.md
index 1cdc843e..556c91a3 100644
--- a/modules/primer-cards/README.md
+++ b/modules/primer-cards/README.md
@@ -1,8 +1,12 @@
-# Primer Marketing CSS Cards
 
+# Primer Marketing CSS Cards
 [![npm version](http://img.shields.io/npm/v/primer-cards.svg)](https://www.npmjs.org/package/primer-cards)
 [![Build Status](https://travis-ci.org/primer/primer-css.svg?branch=master)](https://travis-ci.org/primer/primer-css)
 
+# ⚠️ The primer-cards module is being deprecated in the next major version. Use primer-box instead.
+
+
+
 > Card-like containers to group semantically related content together on marketing websites at GitHub.
 
 This repository is a module of the full [primer-css][primer] repository.
diff --git a/modules/primer-cards/index.scss b/modules/primer-cards/index.scss
index d5f037cb..a43ab0f6 100644
--- a/modules/primer-cards/index.scss
+++ b/modules/primer-cards/index.scss
@@ -1,4 +1,6 @@
 // support files
+@warn "primer-cards: The primer-cards module is being deprecated in the next major version. Use primer-box instead.";
+
 @import "primer-support/index.scss";
 @import "primer-marketing-support/index.scss";
 @import "./lib/cards.scss";
diff --git a/modules/primer-forms/lib/form-validation.scss b/modules/primer-forms/lib/form-validation.scss
index d59cd1db..fe3fe8c9 100644
--- a/modules/primer-forms/lib/form-validation.scss
+++ b/modules/primer-forms/lib/form-validation.scss
@@ -52,6 +52,8 @@ dl.form-group > dd {
 // A selector for credit cards. Shows all credit cards we have available and
 // dims the non-selected ones.
 
+@warn "primer-forms: The credit cards component is being deprecated in next major version.";
+
 .form-cards {
   height: 31px;
   margin: 0 0 15px;