You can carry the delivery by yourself if it is possible (like the case if you've to do an express delivery with our mobile app) but usually you've to find your best "global partner" (dhl, ups, fedex, royal mail for example) without using third part shippers.
Usually people go to a third part forwarder because paper work to do for send a parcel to an international receiver is very hard and one person can get scared from customs etc.
Our site will provide documentation and also when you're going to send a parcel gonna be "Person to Person" and not "Business to Person" so your package have a very low amount of % that gonna be checked by customs for more tax (In fact, parcel are be checked for drugs, weapons etc. But for tax only B2P parcels are more or less checked in proportion 1 to 15 (it can be different for each country) while P2P is like 1 to 100).
So avoiding third part fees, and working a bit on our platform you can become a forwarder and increare your monthly incomes just helping people to receive your package!