Dealing with trust

I recollected a memory of the past. Back in the days of Philadelphia when a friend, Jonathan Koay (who also claimed to be Christian, now husband of Sandy Ma) asked me to help him ship his package home as he was taking a prior flight back to Malaysia for good. He gave me some money saying that it was the right amount (I don't remember the numbers, perhaps it was in the hundred), but when the carrier came and weighted his stuff, it cost more, perhaps $50 to $100 more. I paid for the extra but after a hard time of getting in touch with Koay, he told me that he had paid me in full. When I tried to explain to him there was an extra amount, he stopped responding.

I don't think he intended to cheat me, which means that he probably thought I was trying to cheat him or giving him a hard time. However, this does not make him faultless. Whatever his problem is, after considering 1 Corinthians 13:5, I see two choices in dealing with him, which is not likely to happen anyway, but to the likes of him:

1. Sign contracts, keep receipts, even if it is $1.00. Yes, I keep no record of evil (I still trust some good in people) but I shall make sure I am not fooled twice. I don't need to do the same for other friends, com'n, it is only $1. But with the likes of Jonathan Koay, SIGN THE CONTRACTS! Friends, sure, I didn't refuse to help him after all, did I? It is his choice of whom he wants help from.

2. If there is no knowledge of who is like him, then it can be considered to just deny service when things go wrong and have his package left in the corner until a certain time before going to donation. Wisdom in this is to know this ahead of time and tell him before hand.