Paypal - Free Returns up to £15, up to 12 times per Year
Opt in via your account on the offers page.
This is really helpful especially when you're shopping on eBay etc. and you have to return items and it's that time of year when you go on a shopping spree. Remember this only works if you pay through PayPal.
RETURN SHIPPING ON US.*
Activate this service for free and we’ll cover up to £15 of return shipping costs per return, for up to 12 eligible returns per year worldwide.