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1  Other / Beginners & Help / Re: How can a person prove that a Bitcoin transaction has been sent by them? on: November 26, 2016, 01:31:57 PM
Quote from: shorena on November 26, 2016, 10:29:20 AM
Quote from: BeatsBearsBattlestar on November 26, 2016, 09:54:33 AM
Quote from: buwaytress on November 26, 2016, 08:34:05 AM
You answered your own question actually... yes ask all senders to sign their sends.

Can you please tell me how it's done? I'm not very good at this, as you can probably tell.
-snip-

I guess the subtle hint was not enough.

CLICK HERE TO LEARN HOW TO SIGN A MESSAGE WITH VARIOUS WALLETS, HOW TO PRESENT THE MESSAGE TO OTHERS AND WHICH WALLETS DO NOT ALLOW YOU TO SIGN -> https://bitcointalk.org/index.php?topic=990345.0
Quote from: OgNasty on November 26, 2016, 10:17:16 AM
Quote from: BeatsBearsBattlestar on November 26, 2016, 09:54:33 AM
Quote from: buwaytress on November 26, 2016, 08:34:05 AM
You answered your own question actually... yes ask all senders to sign their sends.

Can you please tell me how it's done? I'm not very good at this, as you can probably tell.

It depends on what client you're using.  Basically, the sender just uses the address the coins were sent from to sign a statement proving to you who they are.  Then you use your client to verify that the message goes with the address.

Using core, here's what the sign message screen looks like:



Right. Thank you very much for your help guys!
2  Other / Beginners & Help / Re: How can a person prove that a Bitcoin transaction has been sent by them? on: November 26, 2016, 09:54:33 AM
Quote from: buwaytress on November 26, 2016, 08:34:05 AM
You answered your own question actually... yes ask all senders to sign their sends.

Can you please tell me how it's done? I'm not very good at this, as you can probably tell.

Quote from: buwaytress on November 26, 2016, 08:34:05 AM
However, if you're only sending back to senders, then it shouldn't matter as you only need to cross reference all spends to you and send back returns to the corresponding addresses.

I'm not going to send them money back, or any other digital asset. They are getting a service in real life, so I have to know who's who.
3  Other / Beginners & Help / How can a person prove that a Bitcoin transaction has been sent by them? on: November 26, 2016, 08:30:59 AM
Hi guys, I want to crowdfund a project by means of Bitcoin donations. The setup is very simple: I have a Bitcoin wallet, and everyone who sends any money to it gets a little something in return.

The only problem is that I have no way of confirming which person is behind every transaction. Is there an easy and surefire way for the senders to sort of "sign" their transactions, to be able to prove that it's theirs?
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