Not sure if this has been posted but couldn't find it as part of the long running deals
I used this today for a late delivery from the recent CUB Goose Island Session IPA deal as it was guaranteed to be delivered by yesterday and in still in transit.
Went into eBay purchases, selected report late delivery and received a $10 voucher straight into my eBay account which I just used for a Xiaomi Mi Power Bank 2S powerbank $18.95, down to $8.95 delivered.
You have 30 days from late delivery to claim your voucher so any CUB deals from the last month make sure you check your purchase history as it will all be listed.
Not all sellers use the Guaranteed Delivery option, but it's sure good to hold them to account if they do
Lastly I'd previously believed this to be a $5 vocuher but mine was a $10 voucher today, so please let me know in the comments what you have received
Note: Coupons will be available in My eBay and they expire 30 days from the date they're issued. To redeem the coupon, enter the code at checkout.
Hope it comes in useful