I'm trying to complete the final step of verification on couchsurfing.org and the country where I live (Dominican Republic) essentially doesn't have public mail. I've heard services like DHL can deliver to your door even if the postal system is unreliable. Does anyone have any suggestions as to how to get my location verified?
As @Jonik said, you can skip verification, make some friends locally in Dominican Republic, get some references, and everything will be ok.
Due to the number of postcards we mail out, we cannot vary our processes, and we almost have it fully automated, with very little human interaction. This is a good thing, since we have a very small, dedicated volunteer team that assists with verification issues.
So you really must contact some human to solve your problem.
Other way is to contact verified members from Dominican Republic, meet them in off-line and get some information from them.