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The number of bitcoin scams has been rapidly rising. Many of them ask people to send bitcoin to the addresses they provide, such as bitcoin giveaway scams that promise to double the amount of bitcoin you send. The great Twitter hack last week, for example, had many high-profile accounts tweet about fake bitcoin giveaways.

Before sending your bitcoin to an address, you can check to see if that address has been reported as one being used in a scam. Bitcoin Abuse is a popular website with a public database of bitcoin addresses used by hackers and criminals. You can look up a bitcoin address, report a scam address, and monitor addresses reported by others.

If the bitcoin address you are searching on the site has been reported by others, the site will display information, such as the number of times the address has been reported, the last report date and time, the total amount of bitcoin it has received, and the number of transactions. There will also be a link to Blockchain.info for you to track the transactions for the address. The site will also display all the reports filed on the address. 

Check the site https://www.bitcoinabuse.com/