In working on a recent project we encountered a problem. The client wanted the ubercart to have certain functions, namely:

• Recurring billing
• Coupon codes up to and including 100% off

No rocket science, right? It wasn’t that easy to make it work though, we needed three modules:

• UC Recurring Payments and Subscriptions
• Ubercart Discount Coupons
• UC Free Order Payment Method

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