Discount codes don't stack. If you have 54% off discount, they can't also use a "free shipping" coupon since Only one discount at a time can apply to a single order at the Harmonic Scanner site.

Of course not, most coupons may be used only by you when you received them directly from Harmonic Scanner. As the Harmonic Scanner coupon includes your User ID, it cannot be resold or transferred in any way.

Usually, Coupon Stacking is not allowed at Harmonic Scanner. However, the store will surely give out notice if available.

Yes. Coupons for each Discount Event of Harmonic Scanner will be collected here while being updated day by day. Sometimes, there will be deals not updated promptly but it's rare, we expect sympathy from you. 

Our advice for you to use Harmonic Scanner Coupon effectively is to choose the right day.
Like thousands of other consumers, the time of promotion is when they choose to
shop at Harmonic Scanner, so take advantage of coupons released on those days to save.

Shoppers can get coupons for their first purchase at the store. However, it is not all the time, sometimes, they cannot apply a discount on items selling out or items not contained in the promotion program. It depends on the time you shop at Harmonic Scanner.