Shopify app
Newmodlet: Block PO Box & Lockers
Prevent return fees and failed deliveries instantly.
- Rating on Shopify
- 5.0(1)
- Reviews
- 1
- Developer
- modlet
- Launched
- March 9, 2026
- Pricing
- Free plan available. Free trial available.
- Languages
- English
The facts
Every value below is read from the listing or computed by the published formula. Nothing is a verdict.
Bayesian rating
4.59
category median 4.60
Reviews in the last 180 days
1
from the 1 reviews on the listing page
1 and 2 star share
0%
0 of 1
Starting price
$7.99/month
band: Under $10 · 30-day trial
Pricing plans as listed on Shopify
All charges are billed in USD. Recurring and usage-based charges are billed every 30 days.
| Plan | Price | Billed yearly | Trial | Usage fee | Included |
|---|---|---|---|---|---|
| Free | Free | not offered | none | none stated | Block PO Boxes globally (Instant setup); Up to 250 Store Orders per Month; Native & Secure Checkout Validation; Address Simulator & Testing Tool |
| Pro | $7.99/month | $79.99/year | 14 days | none stated | Unlimited Orders & Address Validations; Custom Error Messages & Translations; Shipping Method Filtering; Product Exemptions; Country & Region Whitelisting; Granular Pattern Rules; VIP Customer Tag Exemptions |
| Enterprise | $99.99/month | $999.99/year | 30 days | none stated | White-Glove Setup & Dedicated Onboarding; On-Demand Custom Data Exports & Reports; Priority Custom Feature Development; Dedicated Technical Account Manager; 1-on-1 Workflow & Strategy Configuration; Guaranteed Custom SLA & Compliance Help |
Rating distribution
1 ratings on the listing when last refreshed.
- 5 stars1(100%)
- 4 stars0(0%)
- 3 stars0(0%)
- 2 stars0(0%)
- 1 star0(0%)
Latest reviews
The 1 most recent of 1 on-page reviews, quoted to at most 25 words each. Full reviews are on the Shopify listing.
5 starsMay 11, 2026Pulse MindfulnessUnited StatesAbout 1 hour using the app
"Great app and excellent support. We installed Modlet PO Box Blocker because we needed a reliable way to block PO boxes, parcel lockers, pickup points ..."
Developer replied. Read on Shopify
Works with
Third-party integrations link to their hub when 5 or more apps name them. Shopify's own surfaces are listed separately and never counted as integrations.
Shopify surfaces: Checkout, Shopify Admin
Data access
As disclosed on the listing. Never scored.
View customer data
Device and activity data
- Device and activity data: Geolocation, IP address, browser and operating system
View staff and contributor data
Store owner
- Store owner: Name, email address, phone number, physical address
View and edit store data
Products, orders, Shopify Functions, custom data
- Edit products: Products, collections
- View orders: Shipping information
- Edit Shopify Functions: Delivery customizations, cart and checkout validations, cart transforms
- Edit custom data: Metaobjects
- View other data: Shopify Markets settings
Developer
modlet
- Apps in the dataset:
- 2
- Address:
- 4370 Chicago Drive SW, Unit #744, Grandville, MI, 49418, US
- Website:
- modlet.app
- Support email domain:
- modlet.app
- English support:
- yes
- Resources:
- Privacy policy, FAQ
Similar apps
Shopify's own similar-apps list first, then apps in the same category that share the most feature handles.
From the Shopify listingDeveloper claims, shown verbatim and collapsed. 84 words.Show
- Block PO Boxes and lockers worldwide to stop failed deliveries.
- Secure checkout blocking that buyers cannot bypass or work around.
- Test your blocking rules safely using the built-in address simulator.
- Pro: Create custom error messages to match your brand and local languages.
- Pro: Set specific exception rules for shipping methods, regions, or products.
Stop paying expensive carrier return fees for undeliverable addresses.
Protect your shipping margins with reliable, global PO Box blocking. Built natively into Shopify Checkout, it physically blocks checkout completion for restricted addresses—ensuring 100% reliability. Why offer a generous free tier? Built by a veteran cloud architect, our highly efficient infrastructure keeps costs low, and we love helping new stores get off the ground. Grow with us for free, and upgrade to Pro as your volume increases or when you need granular, custom shipping rules.
Questions and comments
Questions people ask about modlet: Block PO Box & Lockers, answered from what this page shows. Entries marked Site editor are written by the EcomAppReviews editor. Reader comments appear after a person has read and approved them, usually within a day. E-mail addresses are never published.
Last updated Oct 20, 2026. Ratings and review counts are the values shown on each app's public listing. How the numbers are computed: methodology.
1 review counted on the listing. Rating and count in the structured data are the values Shopify displayed when the listing was last refreshed.