Coupon leak protection for small stores (no Shopify Plus needed)

Guide by Northlight Apps · Updated 1 November 2026

Short answer: if you're a smaller store and your main problem is influencer or affiliate codes being used by strangers, you may only need one thing: make each creator's code work for shoppers who come through that creator's link, and nobody else.

What small stores usually need

Keep the creator's code alive. Their posts already show the code. Deleting it breaks those posts.
Stop strangers from using it. Coupon sites and browser extensions spread codes to shoppers who were going to buy anyway.
Low cost and easy removal. No long setup, no lock-in.

Three ways to do it

1. Free: limits in Shopify

Set an end date, "one use per customer" and a usage limit on each code. This reduces damage but still lets any stranger use the code once.

2. Rotate codes

Give creators a new code each campaign. It works, but old posts stop working and creators don't love it.

3. Link-locked codes

The code only gives a discount when the shopper arrived through the creator's link. Followers get the deal; coupon-site traffic doesn't. This is what our app, LinkLock, does, for $12/month or a free plan for one code.

Honest limits

Link-locked codes don't stop a code from being posted. They stop it from giving a discount without the link. If you need extension blocking or leak monitoring across coupon sites, LinkLock doesn't do that.

LinkLock is ours and is waiting for Shopify App Store approval. More detail: how to stop discount code leaks.