Pass2U Checkout is the best Apple Wallet Pass / Passbook verification service for merchants.

Experience features of pass redemption and distributing by clicking “Try It First” in this app directly.

Features

1) Distribute Customized Passes： Distribute personal passes to build a strong relationship with customers.
2) Multiple Redemption on One Pass： Be adaptive to different period of discounts, courses and campaigns of passes.
3) Update Points and Credits Instantly： Update information of passes to enrich consumption experiences and repurchase intention.
4) Records Retention： Merchants can search all records anytime.

If you want to issue your own passes, you can sign up an account at https://www.pass2u.net. Set up your checkout service account there then you can log in this app to redeem the passes.