![Wink ;)](./images/smilies/icon_e_wink.gif)
Why is that? As all private shipping companies UPS usually deals with the clearing formalities as soon as a parcel arrives in any country. That sounds like a nice service at first since the recipient doesn't have to deal with customs authorities, but besides a mandatory handling fee (~$15) more often than not this leads to unwanted side effects in the form of grossly miscalculated customs charges. UPS tends to assume the highest possible shipping costs as a base for the customs calculations whenever they are unsure. And they often are, which is quite amazing considering that they're the shipping service...
In this regard it would be better to handle international shipments via US Postal. This way in most countries the parcels would be delivered to local customs offices by public postal services. Recipients would have to deal with customs offices themselves, but that is almost always less hassle than dealing with the possible consequences of miscalculated customs charges by UPS and the likes.