When rogue online pharmacies decide they need more victims or more revenue, sometimes they turn to some really outrageous tactics.
For example, there are certain online pharmacies, who after providing the medicine (usually prescription medicine) calls their customers, taking up the identities of special service agents and using fear tactics extract even more money from their victims. ABC news had a Nightline program reporting about this issue:
And there is an ongoing discussion about this on the Pharmacy Reviewer forum:
Pharmacy Reviewer: DEA Agent Impersonator Calls
However, long story short: DEA agents never call and warn about searching your apartments or demand anything from you. This is unlawful as there is no way you can identify an agent through the telephone.
Another trick fraudsters use to extort money after an order has been made (and paid for) is to email asking for more money. Usually the fraudsters’ excuse is an unavoidable price change, a better deal (buy more for just a little bonus), or a failure to receive money (which is almost always a lie). Customers often pay up, because they are afraid they will not receive their shipments otherwise. However most often this scam tactic is simply an attempt to extort even more money from their victims, because they will probably not follow through with the order even with additional money spent.
The last, common trick when dealing with overseas online pharmacies, is their refusal to accept any payment options other than Western Union. Western Union basically allows the fraudsters to completely vanish with your money. After someone in an overseas country takes your money, they have no tracks they should cover, so maximum care should be taken with online pharmacies with WU as their sole payment option. There is an example on the PR Forum of a man who was scammed out of $900 by paying through Western Union, showing the risks of using Western Union.