I had a box of suits and shirts sent to me 18 months ago. Aduana asked me what was in the box. I told them. They handed me the box and I walked out.
Easy peasy.
Well yes, in this country there is the law and then there is what actually happens on the day, which may (or frequently may not) bear any relation to each other. But if one is trying to enforce one's rights, or even to take the legal/moral high ground, it is useful to know the actual law related to the situation.
I didn't say it was illegal to
receive used clothes in Argentina when posted from another country. It may not be - the law here is not always symmetrical. And clearly the baggage forwarding services must have some validity at law. In the case of my guest I was trying to send a parcel to a different person (who was in another South American country at the time), but sending things to oneself in another place may be something different. And none of that will account for a clerk in customs (or wherever) who insists that things be done in a particular way [because they had the wrong information, didn't understand the process, don't like you because you are a foreigner, want you to pay a bribe, or it's nearly closing time and they want you to go away, etc - pick reason for the day].
One of the difficulties with giving and receiving advice in an open forum is that people who had a successful outcome in a particular situation often assume it was because they 'did it right' - and that therefore people who have a problem must have done the wrong thing. Or people who have difficulties assume that the same thing will be difficult for everyone. The greatest challenge I have found here is that nothing is ever the same for two people, two days, two clerks, etc - it is like living on the other side of the looking glass. So I appreciate good advice, try to learn patience, and feel great sympathy for people when their turn comes on the wrong day or with the wrong person.
On the credit card experience swapping note - mine arrived last week in a document envelope in the ordinary mail. The envelope had been opened and the small gift inside extracted, but the documents and the credit card were still there. And my theory? The building encargarda opened it and took the gift before distributing the mail. The dangers of sending and receiving things are not limited to the correo and customs.