I have used a lot of coupons at Joanns over the years. I always assumed that I could only use 1 coupon per visit, however, after doing some research that might not be true.   It may be up to your manager or cashier.

As of 11/6/2011, I went to JoAnns and I confirmed with the cashier that you can use more than 1 coupon per visit, however, they don’t double.   I was able to use a 40% off coupon on 1 regular price item and a 25% off the whole store purchase on regular and sale priced items excluding the 40% off coupon item.  The register automatically detects the coupon used.   If you have a 2 coupons that are40% off a regular priced item YOU can use both coupons 1 on each item.

Here is a forum from 7/2009 talking about the coupon policy.  Click HERE to read it.

Here is the coupon policy via the FAQ for online orders on JoAnn.com:

Can I use two coupon codes on one order?

We’re sorry, you can NOT use two coupons or promotion codes on one order.

Price adjustment policy

Joann.com will offer a price adjustment for Joann.com advertised products for 7 days from the date your order ships. Seasonal items do not qualify for price adjustments.

Jo-Ann Stores WILL match prices when the following conditions are met:
applies to identical item
price to match must have been advertised within the past 7 days
includes ads for competitors, Jo-Ann stores and Joann.com
Pricing policies may be different between the website and stores due to different promotion timing.
requires proof of lower price via original/current ad or print-out of online price
excludes special buys, liquidations, and club purchases

What experience have you had with coupons at JoAnn stores?