Hello,

I've made dozens of transactions previously but the last one seems to have failed.

I sent 80 BTC to another person using my Blockchain android app. The person saw this incoming transaction in his wallet and his balance updated to 80 BTC. Everything was perfectly fine as usual.

In the evening he calls me and tells me his balance is 0. I check my transaction history and there is NO such transaction there. Moreover, 80 BTC are not in my account either.

Here's what I have:

1. An email confirming that the transaction was sent:

Payment Sent Notification
A Payment has been sent from your bitcoin wallet.
53ad9c3bdc51b496242601c2425a0814c0bfd93f99cc40801c178b6346eadf07
beeteecee
1Mu7R5BGKQSb3QEcTyEpii9C43tpDewtNL 80.03 BTC
beeteecee 78.62226501 BTC
-80.03 BTC
https://lh6.googleusercontent.com/-qxlfV7WV1-g/UVh7c_1A3AI/AAAAAAAAH-g/cqBsv1TvDS8/s1139/Screen+Shot+2013-03-31+at+11.06.54+AM.png
https://lh6.googleusercontent.com/-qxlfV7WV1-g/UVh7c_1A3AI/AAAAAAAAH-g/cqBsv1TvDS8/s1139/Screen+Shot+2013-03-31+at+11.06.54+AM.png

2. Luckily I left the page open on my computer when I checked the status of the transaction before I left home. I made a screenshot of it.
https://lh6.googleusercontent.com/-f0dZwfR1160/UVh6uzlOUnI/AAAAAAAAH-Y/6MP1jH_AMsQ/s1221/Screen+Shot+2013-03-30+at+8.46.52+PM.png
https://lh6.googleusercontent.com/-f0dZwfR1160/UVh6uzlOUnI/AAAAAAAAH-Y/6MP1jH_AMsQ/s1221/Screen+Shot+2013-03-30+at+8.46.52+PM.png

Like I said the transaction does NOT show up in my transaction history anymore and when I click on the link in my email it goes the main blockchain.info page with this message: Transaction not found.

Please let me know what I can do here to return my bitcoins. It is 8 thousand dollars we are talking about now. And as far as I understand it can happen to anyone.

I've been dealing with bitcoins for a year now but this situation made me back off with my optimism.

P.S. The guy I sent the bitcoins to also sent an email to the Blockchain.info support.

UPD. Here's the recipient's wallet address on blockchain: https://blockchain.info/address/1Mu7R5BGKQSb3QEcTyEpii9C43tpDewtNL. It says No transactions found for this address.
The sender's address: https://blockchain.info/address/18JP8n2bzJhNXqiQvrS5h28mgEuGDaTn51

UPD2. So, here's what happened:

1. My friend asked me to back him up and sell this guy 80 BTC. he sends me those 80 BTC because I didn't have enough in my balance.
2. I meet the buyer and do the trade, I send him 80 BTC.
3. By nighttime, the transaction disappears from my wallet and the buyer's wallet.
4. Turns out the transaction my friend sent me was never processed. So he had those 80 BTC returned to his wallet. But for some reason they still showed up in my wallet during the trade, that's why I didn't hesitate.
5. My friend just sent me those 80 BTC again. Which I will froward to the buyer. All sorted out.