We actually just had a double spend try and happen to us. I cannot show you the links, because the blockchain already ignored them.
What happened was:
We run a fundraiser for helping in the expansion of foldingcoin http://foldingcoin.net/fundraising/ and we use a company called Vennd.io to help in this fundraiser.
What happens is someone will send BTC to a certain address, and in return they are given an amount of 1 FLDC per every 0.00001 BTC they donated. Someone recently tried to double spend a BTC transaction to trick Counterparty into giving them double the FLDC in return for their BTC. However since the double BTC was denied, so was the double FLDC.
What happened was:
We run a fundraiser for helping in the expansion of foldingcoin http://foldingcoin.net/fundraising/ and we use a company called Vennd.io to help in this fundraiser.
What happens is someone will send BTC to a certain address, and in return they are given an amount of 1 FLDC per every 0.00001 BTC they donated. Someone recently tried to double spend a BTC transaction to trick Counterparty into giving them double the FLDC in return for their BTC. However since the double BTC was denied, so was the double FLDC.
I tweeted about it, but its no longer in the blockchain, here is the tweet https://twitter.com/FoldingCoin/status/558704804449771520 when it was solved, and here was the first tweet about the actual transaction https://twitter.com/FoldingCoin/status/558073025468567553