diff --git a/assets/i18n/en/main.ftl b/assets/i18n/en/main.ftl
index 9608403..b6ad1f2 100644
--- a/assets/i18n/en/main.ftl
+++ b/assets/i18n/en/main.ftl
@@ -484,6 +484,7 @@ bank-variable-symbol = Variable symbol
 bank-amount = Amount
 admin-shipping = Shipping
 admin-shipping-desc = set the price and availability of each delivery option.
+shipping-packeta-missing-settings = Packeta can be enabled after PACKETA_API_KEY, PACKETA_API_PASSWORD and PACKETA_SENDER_LABEL are configured.
 admin-payments = Payments
 admin-payments-desc = enable or disable payment methods and edit bank-transfer details.
 payment-methods = Payment methods
diff --git a/assets/i18n/sk/main.ftl b/assets/i18n/sk/main.ftl
index d75b178..c7ddc22 100644
--- a/assets/i18n/sk/main.ftl
+++ b/assets/i18n/sk/main.ftl
@@ -484,6 +484,7 @@ bank-variable-symbol = Variabilný symbol
 bank-amount = Suma
 admin-shipping = Doprava
 admin-shipping-desc = nastaviť cenu a dostupnosť jednotlivých možností dopravy.
+shipping-packeta-missing-settings = Packeta sa dá zapnúť až po nastavení PACKETA_API_KEY, PACKETA_API_PASSWORD a PACKETA_SENDER_LABEL.
 admin-payments = Platby
 admin-payments-desc = zapnite alebo vypnite spôsoby platby a upravte údaje pre prevod na účet.
 payment-methods = Spôsoby platby
diff --git a/assets/views/admin/shipping/index.html b/assets/views/admin/shipping/index.html
index 1fad714..f58df4b 100644
--- a/assets/views/admin/shipping/index.html
+++ b/assets/views/admin/shipping/index.html
@@ -18,12 +18,21 @@
     <div class="min-w-40">
       <p class="font-semibold text-on-surface-strong dark:text-on-surface-dark-strong">{{ method.name }}</p>
       <p class="text-xs text-on-surface/60 dark:text-on-surface-dark/60">{{ method.carrier | upper }}{% if method.requires_pickup_point %} · {{ t(key="checkout-pickup-point", lang=lang | default(value='sk')) }}{% endif %}</p>
+      {% if method.packeta_not_ready %}
+      <p class="mt-1 text-xs text-warning">{{ t(key=method.lock_reason, lang=lang | default(value='sk')) }}</p>
+      {% endif %}
     </div>
     <div class="space-y-1.5">
       <label for="price-{{ method.id }}" class="text-sm font-medium text-on-surface-strong dark:text-on-surface-dark-strong">{{ t(key="price", lang=lang | default(value='sk')) }}</label>
       {{ ui::input(name="price", id="price-" ~ method.id, value=method.price, width="w-28", attrs='inputmode="decimal"') }}
     </div>
-    <div class="pb-2">{{ ui::checkbox(name="enabled", label=t(key="shipping-enabled", lang=lang | default(value='sk')), checked=method.enabled) }}</div>
+    <div class="pb-2">
+      {% if method.locked %}
+      {{ ui::checkbox(name="enabled", label=t(key="shipping-enabled", lang=lang | default(value='sk')), checked=method.enabled, attrs='disabled') }}
+      {% else %}
+      {{ ui::checkbox(name="enabled", label=t(key="shipping-enabled", lang=lang | default(value='sk')), checked=method.enabled) }}
+      {% endif %}
+    </div>
     {{ ui::button(label=t(key="save", lang=lang | default(value='sk')), type="submit", extra="ml-auto") }}
   </form>
   {% endfor %}
diff --git a/src/controllers/admin_shipping.rs b/src/controllers/admin_shipping.rs
index ba7b387..7a9f7e6 100644
--- a/src/controllers/admin_shipping.rs
+++ b/src/controllers/admin_shipping.rs
@@ -16,6 +16,7 @@ use crate::{
     shared::{
         guard,
         money::{format_price, parse_price_to_cents},
+        shipping as shipping_rules,
     },
 };
 
@@ -37,13 +38,17 @@ async fn index(
     State(ctx): State<AppContext>,
 ) -> Result<Response> {
     guard::current_admin(auth, &ctx).await?;
+    shipping_rules::disable_packeta_if_unconfigured(&ctx).await?;
     let methods = shipping_methods::Entity::find()
         .order_by_asc(shipping_methods::Column::Position)
         .all(&ctx.db)
         .await?;
+    let packeta_ready = shipping_rules::packeta_ready(&ctx);
     let rows: Vec<serde_json::Value> = methods
         .iter()
         .map(|m| {
+            let packeta_not_ready = m.carrier == "packeta" && !packeta_ready;
+            let locked = packeta_not_ready && !m.enabled;
             json!({
                 "id": m.id,
                 "code": m.code,
@@ -52,6 +57,9 @@ async fn index(
                 "carrier": m.carrier,
                 "requires_pickup_point": m.requires_pickup_point,
                 "enabled": m.enabled,
+                "packeta_not_ready": packeta_not_ready,
+                "locked": locked,
+                "lock_reason": if packeta_not_ready { Some("shipping-packeta-missing-settings") } else { None::<&str> },
             })
         })
         .collect();
@@ -74,9 +82,15 @@ async fn update(
         .one(&ctx.db)
         .await?
         .ok_or_else(|| Error::NotFound)?;
+    let requested_enabled = is_checked(&form.enabled);
+    if requested_enabled && method.carrier == "packeta" && !shipping_rules::packeta_ready(&ctx) {
+        return Err(Error::BadRequest(
+            "Packeta cannot be enabled until PACKETA_API_KEY, PACKETA_API_PASSWORD and PACKETA_SENDER_LABEL are configured.".to_string(),
+        ));
+    }
     let mut active = method.into_active_model();
     active.price_cents = Set(parse_price_to_cents(&form.price)?);
-    active.enabled = Set(is_checked(&form.enabled));
+    active.enabled = Set(requested_enabled);
     active.update(&ctx.db).await?;
     format::redirect("/admin/shipping")
 }
diff --git a/src/controllers/checkout.rs b/src/controllers/checkout.rs
index 142a7c1..828ffbf 100644
--- a/src/controllers/checkout.rs
+++ b/src/controllers/checkout.rs
@@ -18,7 +18,7 @@ use crate::{
         users::{self, normalize_account_type},
     },
     controllers::i18n::current_lang,
-    shared::{currency::Currency, guard, money::format_price, settings},
+    shared::{currency::Currency, guard, money::format_price, settings, shipping as shipping_rules},
     views::checkout as view,
 };
 
@@ -67,11 +67,16 @@ fn cleared_cart_cookie() -> Cookie<'static> {
 }
 
 async fn enabled_shipping_methods(ctx: &AppContext) -> Result<Vec<shipping_methods::Model>> {
+    shipping_rules::disable_packeta_if_unconfigured(ctx).await?;
+    let packeta_ready = shipping_rules::packeta_ready(ctx);
     Ok(shipping_methods::Entity::find()
         .filter(shipping_methods::Column::Enabled.eq(true))
         .order_by_asc(shipping_methods::Column::Position)
         .all(&ctx.db)
-        .await?)
+        .await?
+        .into_iter()
+        .filter(|method| method.carrier != "packeta" || packeta_ready)
+        .collect())
 }
 
 async fn enabled_payment_methods(ctx: &AppContext) -> Result<Vec<payment_methods::Model>> {
@@ -264,6 +269,9 @@ async fn place_order(
         .one(&ctx.db)
         .await?
         .ok_or_else(|| Error::BadRequest("invalid shipping method".to_string()))?;
+    if method.carrier == "packeta" && !shipping_rules::packeta_ready(&ctx) {
+        return Err(Error::BadRequest("invalid shipping method".to_string()));
+    }
 
     let (pickup_point_id, pickup_point_name) = if method.requires_pickup_point {
         let id = form
diff --git a/src/initializers/shipping_seeder.rs b/src/initializers/shipping_seeder.rs
index d1dfa5c..4ec3cbe 100644
--- a/src/initializers/shipping_seeder.rs
+++ b/src/initializers/shipping_seeder.rs
@@ -9,7 +9,7 @@ use async_trait::async_trait;
 use loco_rs::prelude::*;
 use sea_orm::{ActiveModelTrait, ColumnTrait, EntityTrait, PaginatorTrait, QueryFilter, Set};
 
-use crate::models::shipping_methods;
+use crate::{models::shipping_methods, shared::shipping as shipping_rules};
 
 /// `(code, name, carrier, requires_pickup_point, default_price_cents, position)`
 const BUILTINS: [(&str, &str, &str, bool, i64, i32); 2] = [
@@ -49,6 +49,6 @@ impl Initializer for ShippingSeeder {
             .await?;
             tracing::info!(carrier = code, "seeded built-in delivery option");
         }
-        Ok(())
+        shipping_rules::disable_packeta_if_unconfigured(ctx).await
     }
 }
diff --git a/src/shared/mod.rs b/src/shared/mod.rs
index addac79..3d35aeb 100644
--- a/src/shared/mod.rs
+++ b/src/shared/mod.rs
@@ -7,4 +7,5 @@ pub mod money;
 pub mod pricing;
 pub mod rbac;
 pub mod settings;
+pub mod shipping;
 pub mod slug;
diff --git a/src/shared/shipping.rs b/src/shared/shipping.rs
new file mode 100644
index 0000000..2518936
--- /dev/null
+++ b/src/shared/shipping.rs
@@ -0,0 +1,31 @@
+use loco_rs::prelude::*;
+use sea_orm::{ActiveModelTrait, ColumnTrait, EntityTrait, IntoActiveModel, QueryFilter, Set};
+
+use crate::{
+    models::shipping_methods,
+    shared::settings,
+};
+
+pub fn packeta_ready(ctx: &AppContext) -> bool {
+    ["packeta_api_key", "packeta_api_password", "packeta_sender_label"]
+        .iter()
+        .all(|key| settings::get(ctx, key).is_some_and(|value| !value.trim().is_empty()))
+}
+
+pub async fn disable_packeta_if_unconfigured(ctx: &AppContext) -> Result<()> {
+    if packeta_ready(ctx) {
+        return Ok(());
+    }
+    let Some(method) = shipping_methods::Entity::find()
+        .filter(shipping_methods::Column::Carrier.eq("packeta"))
+        .filter(shipping_methods::Column::Enabled.eq(true))
+        .one(&ctx.db)
+        .await?
+    else {
+        return Ok(());
+    };
+    let mut active = method.into_active_model();
+    active.enabled = Set(false);
+    active.update(&ctx.db).await?;
+    Ok(())
+}