this problem appears when using Ubercart Discount Coupons in conjunction with with Optional Checkout Review
so I have also posted it to the Optional Checkout Review issues here https://drupal.org/node/2254047

Ubercart Optional Checkout Review was installed and working fine, then I installed Discount Coupons 7.x-2.1-alpha7

and now, when I complete and order, with a Discount Coupon applied to it, the order goes through fine but on the Order Complete page I receive the following error:

Notice: Undefined index: sescrd in uc_credit_cart_review_pre_form_submit() (line 770 of sites/all/modules/ubercart/payment/uc_credit/uc_credit.module).

Anyone know how to solve this?