Hi all! First time posting a poslaju parcel here!

Just wanna ask. I used a box to pack my item. Do I need to write the address on top?

According to poslaju website "Recipient's name and complete address must be clearly written on the parcel."
But if I take a flyer and wrap it, then the address isn't visible anymore.

Please help! (I'll be sending lots of parcels in the future so if possible I don't want to write the address on every box.

Thanks!