Quote from: RinaMar on September 12, 2013, 09:02:56 PM

my refund request was rejected.

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Good evening,

You have recently requested a refund for an order you have placed for Avalon ASIC chips. Unfortunately, verification of your request has failed. In order to process the refund request, a message signed using the original sending address used in the transaction is required. Please submit the message "I am hereby requesting refund of payment for my purchase of Avalon ASIC chips from forum member Steamboat" without quotes using the following format:

Bitcoin sending address used for original purchase
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message
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signature

I sent BTC from coinbase directly. I do not see any kind of option to sign message Sad

anybody have any ideas?

Always a bad idea to send payment from online wallets that don't let you control the keys. I don't think coinbase supports message signing. You can maybe contact them?

everything i have seen confirms that they don't support message signing. I sent an email to steamboat so we will see how this goes. up until now i have not been unhappy with the whole process. investing in mining is a risk. I knew of the possibility that this wouldn't turn out but gave it a try anyway. I think that it is fortunate that we are able to get a refund for our chips.

hopefully there will be another way to verify my refund request.

I contacted the coinbase dev team a couple months back about adding message signing, and it's on their radar. No idea whether they are even working on it though. The point of signing a message is to prove that you control that sending address. One other way around this would be for you to send steamboat a very very small amount of BTC in a specific number (like 0.00012345 btc) to prove that you own that address. Steamboat would have to authorize this in advance though.