diff --git a/less/v2/actors.less b/less/v2/actors.less
index ee9c7ef7f1..8adfd83e9b 100644
--- a/less/v2/actors.less
+++ b/less/v2/actors.less
@@ -352,6 +352,42 @@
 
   form:is(.tab-inventory, .tab-features, .tab-spells, .tab-effects) .create-child { display: block; }
 
+  /* ---------------------------------- */
+  /*  Warnings                          */
+  /* ---------------------------------- */
+
+  dialog.warnings:is(#tooltip, .locked-tooltip) { /* :is used here to override specificity of base tooltip styles */
+    position: fixed;
+    width: 300px;
+    max-width: unset;
+    max-height: unset;
+    margin: 0;
+    outline: none;
+    padding: 4px 8px;
+    font-family: var(--dnd5e-font-roboto-condensed);
+
+    li {
+      padding: 6px 8px;
+      border-bottom: 1px dotted var(--dnd5e-color-gold);
+      &:last-child { border: none; }
+
+      a:hover {
+        text-shadow: none;
+        text-decoration: underline dotted;
+      }
+
+      &.warning::before, &.error::before {
+        font-family: var(--font-awesome);
+        font-weight: bold;
+        color: var(--color-text-dark-5);
+        margin-right: 2px;
+      }
+
+      &.warning::before { content: "\f071"; }
+      &.error::before { content: "\f06a"; }
+    }
+  }
+
   /* ---------------------------------- */
   /*  Minimized                         */
   /* ---------------------------------- */
diff --git a/less/v2/apps.less b/less/v2/apps.less
index 7dc39de7fd..9167a23711 100644
--- a/less/v2/apps.less
+++ b/less/v2/apps.less
@@ -19,9 +19,9 @@
       height: 18px;
       aspect-ratio: 1;
       line-height: unset;
-      display: grid;
       place-content: center;
 
+      &:not([hidden]) { display: grid; }
       > i { margin: 0 }
     }
 
diff --git a/module/applications/actor/sheet-v2-mixin.mjs b/module/applications/actor/sheet-v2-mixin.mjs
index 8e24f109ab..450103a297 100644
--- a/module/applications/actor/sheet-v2-mixin.mjs
+++ b/module/applications/actor/sheet-v2-mixin.mjs
@@ -88,14 +88,24 @@ export default function ActorSheetV2Mixin(Base) {
         header.insertAdjacentElement("afterbegin", toggle);
       }
 
+      // Document UUID link.
+      const firstButton = header.querySelector(".header-button");
       const idLink = header.querySelector(".document-id-link");
       if ( idLink ) {
-        const firstButton = header.querySelector(".header-button");
         firstButton?.insertAdjacentElement("beforebegin", idLink);
         idLink.classList.add("header-button");
         idLink.dataset.tooltipDirection = "DOWN";
       }
 
+      // Preparation warnings.
+      const warnings = document.createElement("a");
+      warnings.classList.add("header-button", "preparation-warnings");
+      warnings.dataset.tooltip = "Warnings";
+      warnings.setAttribute("aria-label", game.i18n.localize("Warnings"));
+      warnings.innerHTML = '<i class="fas fa-triangle-exclamation"></i>';
+      warnings.addEventListener("click", this._onOpenWarnings.bind(this));
+      firstButton?.insertAdjacentElement("beforebegin", warnings);
+
       // Render tabs.
       const nav = document.createElement("nav");
       nav.classList.add("tabs", "tabs-right");
@@ -123,6 +133,15 @@ export default function ActorSheetV2Mixin(Base) {
 
     /* -------------------------------------------- */
 
+    /** @inheritDoc */
+    async _render(force=false, options={}) {
+      await super._render(force, options);
+      const [warnings] = this.element.find(".header-button.preparation-warnings");
+      warnings?.toggleAttribute("hidden", !this.actor._preparationWarnings?.length);
+    }
+
+    /* -------------------------------------------- */
+
     /** @inheritDoc */
     async getData(options) {
       this._concentration = this.actor.concentration; // Cache concentration so it's not called for every item.
@@ -430,6 +449,7 @@ export default function ActorSheetV2Mixin(Base) {
       html.find(".sidebar-collapser").on("click", this._onToggleSidebar.bind(this));
       html.find("[data-item-id][data-action]").on("click", this._onItemAction.bind(this));
       html.find("[data-toggle-description]").on("click", this._onToggleDescription.bind(this));
+      html.find("dialog.warnings").on("click", this._onCloseWarnings.bind(this));
       this.form.querySelectorAll(".item-tooltip").forEach(this._applyItemTooltips.bind(this));
       this.form.querySelectorAll("[data-reference-tooltip]").forEach(this._applyReferenceTooltips.bind(this));
 
@@ -488,6 +508,18 @@ export default function ActorSheetV2Mixin(Base) {
 
     /* -------------------------------------------- */
 
+    /**
+     * Handle closing the warnings dialog.
+     * @param {PointerEvent} event  The triggering event.
+     * @protected
+     */
+    _onCloseWarnings(event) {
+      if ( event.target instanceof HTMLDialogElement ) event.target.close();
+      if ( event.target instanceof HTMLAnchorElement ) event.target.closest("dialog")?.close();
+    }
+
+    /* -------------------------------------------- */
+
     /**
      * Handle creating a new embedded child.
      * @returns {ActiveEffect5e|Item5e|void}
@@ -548,6 +580,22 @@ export default function ActorSheetV2Mixin(Base) {
 
     /* -------------------------------------------- */
 
+    /**
+     * Handle opening the warnings dialog.
+     * @param {PointerEvent} event  The triggering event.
+     * @protected
+     */
+    _onOpenWarnings(event) {
+      event.stopImmediatePropagation();
+      const { top, left, height } = event.target.getBoundingClientRect();
+      const { clientWidth } = document.documentElement;
+      const dialog = this.form.querySelector("dialog.warnings");
+      Object.assign(dialog.style, { top: `${top + height}px`, left: `${Math.min(left - 16, clientWidth - 300)}px` });
+      dialog.showModal();
+    }
+
+    /* -------------------------------------------- */
+
     /**
      * Toggle editing hit points.
      * @param {PointerEvent} event  The triggering event.
diff --git a/module/utils.mjs b/module/utils.mjs
index 40788e594b..9111c7613b 100644
--- a/module/utils.mjs
+++ b/module/utils.mjs
@@ -327,6 +327,7 @@ export async function preloadHandlebarsTemplates() {
     "systems/dnd5e/templates/actors/parts/actor-inventory.hbs",
     "systems/dnd5e/templates/actors/parts/actor-spellbook.hbs",
     "systems/dnd5e/templates/actors/parts/actor-warnings.hbs",
+    "systems/dnd5e/templates/actors/parts/actor-warnings-dialog.hbs",
     "systems/dnd5e/templates/actors/parts/biography-textbox.hbs",
     "systems/dnd5e/templates/actors/tabs/character-biography.hbs",
     "systems/dnd5e/templates/actors/tabs/character-details.hbs",
diff --git a/templates/actors/character-sheet-2.hbs b/templates/actors/character-sheet-2.hbs
index c2bec0fc6c..0b7f007229 100644
--- a/templates/actors/character-sheet-2.hbs
+++ b/templates/actors/character-sheet-2.hbs
@@ -518,4 +518,8 @@
             aria-label="{{ "SIDEBAR.Create" type=(localize "DOCUMENT.Item") }}">
         <i class="fas fa-plus"></i>
     </button>
+
+    {{!-- Warnings --}}
+    {{> "dnd5e.actor-warnings-dialog" }}
+
 </form>
diff --git a/templates/actors/npc-sheet-2.hbs b/templates/actors/npc-sheet-2.hbs
index be83a18307..0feb71e050 100644
--- a/templates/actors/npc-sheet-2.hbs
+++ b/templates/actors/npc-sheet-2.hbs
@@ -527,4 +527,7 @@
         <i class="fas fa-plus"></i>
     </button>
 
+    {{!-- Warnings --}}
+    {{> "dnd5e.actor-warnings-dialog" }}
+
 </form>
diff --git a/templates/actors/parts/actor-warnings-dialog.hbs b/templates/actors/parts/actor-warnings-dialog.hbs
new file mode 100644
index 0000000000..63e89e3293
--- /dev/null
+++ b/templates/actors/parts/actor-warnings-dialog.hbs
@@ -0,0 +1,11 @@
+<dialog class="warnings locked-tooltip dnd5e-tooltip active">
+    <ul class="unlist">
+        {{#each warnings}}
+        <li class="{{ type }}">
+            {{#if link}}<a data-target="{{ link }}">{{/if}}
+            {{ message }}
+            {{#if link}}</a>{{/if}}
+        </li>
+        {{/each}}
+    </ul>
+</dialog>