Who's Responsible?

What can you do when your mailman breaks your mailbox?

Thanks, Kamber for your comment, which made me realize

maybe a little background information is due here.  :)

One day, after seeing the mail truck drive by the house, I went out to the mailbox to get the mail.

Only to notice our mailbox door hanging askew, like this:

I was all kinds of mad. After getting the mail out, I could see that the pin that usually kept

the broken side of the door hinged to the mailbox had just fallen out,

but was nowhere to be seen on the ground.

I had no idea what to do.  I asked Reed about it later, thinking maybe he had noticed it earlier or

had possibly done it without telling me.  He too seemed surprised when I told him the mailbox door

was broken.  So, now I knew it was the mailman.  Here now a week and a half-ish later,

I still have no idea what to do.  Which is why I'm presenting this question for all the world to see.

Who is responsible for this problem? I want to fix it before the whole door breaks off because of 

the alternate mailman who seems to care less about our broken door and always leaves it just

hanging there after putting our mail in the box whereas the guilty mailman always takes the time to

put the door back in place.  Any ideas who should be responsible for this problem?