You can use any video hosting website, YouTube will do (set the video as "unlisted"), then paste the link to your reply.

What's happening isn't normal to a standard wallet and AFAIK, isn't a known issue.
I can only suggest to backup your wallet and seed phrase, then reinstall Electrum. (it wont delete your wallets though, but create a backup just in case)
Before installation, make sure to verify it (instructions) before proceeding to make sure that it's not corrupted or a fake version.

It can also happen if he forget to put an amount:


Such thing can happen if he accidentally pasted either the address or amount in the "Description" instead of the dedicated text boxes.

It works at my end.
I just tried it: Downloaded the image, used image-to-text tool, copied the address, then pasted it to android Electrum's send tab.
It immediately recognized "3PDB6kt29Kmiu8j7g24PCcoC1P5XHUZ6yB" and even the address in the other image.

My guess is the image-to-text tool that you've used has faulty character recognition and mistook some of the address' character(s).
...or you've included the dot.

It will take a quite while to confirm because of the fee but it's not missing or anything. Just wait it out if it's not rush.
This thread's topic isn't related to your issue, by the way. It's not lost or will be lost.

We're in Electrum board so I take that it's sent using Electrum...
If so, you can try to use replace-by-fee to increase its transaction fee, right-click on the transaction and click "Increase fee".
Set the new transaction fee, click "Sign" and then "Broadcast".

If Electrum is the recipient that can't spend unconfirmed coins, untick your setting "Tools->Preference->Transactions->Spend only confirmed coins".
You'll be able to spend it after disabling that.
Better off, set a quite larger fee when spending it to bump the parent transaction's fee rate.

I can't reproduce this in v4.3.2, I'm always getting a new or unused address in every request.

Was the gap between those requests more than 10 minutes and your invoice's expiration is set to 10 minutes?
If so, it will reuse the addresses of those old expired invoice as long as the address didn't received BTC yet.

For the label, if the invoice was expired or the amount wasn't fulfilled, the label wont be saved to the history since it didn't matched the invoice.

The workaround is to use the Addresses tab instead ("View->Show Addresses" to enable).
You can put a label to the unused addresses instead and it will show up in the history tab once it receive funds.
Or set expiration to "Never".

OP is probably "trying again" after a few years since his last attempt to spend his funds.
If not, he seems to possess a collection of zero-balance wallets that're failing to sync properly.

Here are his older topics (around 2020):

• i can see BTC on wallet GUI but when i see it on explorer, the balance is NIL
• Status: 0/unconfirmed, not in memory pool

Most likely, it's not online.
Armory requires a full node like Bitcoin Core or similar to operate, use Bitcoin Core for max compatibility.

Do you have Bitcoin Core installed and fully synced without "prune blockchain" settings?
If not: install it, disable "prune block storage to" setting and sync the blockchain (requires 400GB+ disk space).

After that, setup armory's pathing correctly: https://btcarmory.com/docs/pathing

Opening of Bitcoin mining pools are usually announced here: https://bitcointalk.org/index.php?board=41.2000 (last page)
Check if there's a topic that rings a bell.

Or better if you can use the forum's search function:

• On the menu, click "SEARCH". (upper-left)
• Tick the options: "search in topic subjects only".
• Set the message age accordingly; about "Between 3650 and 9999 days", or lower for allowance.
• Untick "check all" and expand "Choose a board to search in, or search all", then tick "Pools" under Mining.
• Fill up the search with "pool", and press enter.
  
  

The search window should look like this:


-edit-
fixed image link

Guessing can be unreliable since the 10BTC+ in your wallet can be in multiple addresses
and there's no way to link them with each other specially if you haven't reused any of the address.

It may be possible if you've only received the bitcoins whole - in one transaction.

BTW, "wallet" is not "address":

• Wallet is your Electrum client.
• Address is what you're using to send/received bitcoins to your wallet.

@BGK045
Your other thread in "Wallet Software" board has more reliable answers, you can stick to it for further questions.
I'll ask a mod to close this thread.

Link to the other topic: /index.php?topic=5422474.0

Seems like the question is designed to be answered by the "Alice and Bob" Wikipedia Article: https://en.wikipedia.org/wiki/Alice_and_Bob

I do not know the full history nor read the Wikipedia article before but I always take it as examples "A" and "B" when need to be used as names.

Most pools query for getblocktemplate RPC every few seconds/minutes to get the transactions with highest fee rate.
The gap of each RPC call depends on the pool/solo miner's set-up.
Maybe the miner of that block still haven't refreshed their block template at that time and still had your transaction in the block that they're currently mining.

The second part "they also have low txfee txns" isn't probable since they can easily manually add their own low-fee transactions if they want to.
They don't have to globally accept low fee transactions to include theirs.

The former decoded into the address, purely the address string.
The latter has extra metadata, namely "bitcoin:", fee and rbf false flag; probably the cause of the issue in other wallets.

Electrum, Mycelium, Blockchain(dot)com, Bitcoin(dot)com and Blue wallets work.
Green on the other hand, scans, but has to manually delete the other data and leave the address.
(some of the tested wallets are outdated)

Maybe it has something to do with the QR Code's size, I'm viewing it with a 1080p - 22" monitor, 100% scale of the page.

Users have previously mentioned that it's entirely not based from the amount.

If your comment is based from self-experience, it's most likely that you have multiple inputs with small amounts that it would take 2 or more inputs to fulfill the high amount you've inputted.

e.g.: Let's say you've received 0.0001, 0.00011 and 0.00012 BTC before that aren't consolidated into 1 UTXO.
If you need to send 0.00009 BTC; it will only have to use 1input, thus smaller transaction size and lower fee.
If you need to send 0.0003 BTC; it will have to use all three inputs, thus higher transaction size and higher fee.

Would be nice if you can link the repository or official Bitcointalk threads of each tools.
Because otherwise, people will rely on Google to search for them and will likely find malware versions, specially newbies.

Bitcoin-qt's private keys aren't based from your wallet's password, those were randomly generated.

Plus there's no other backup method aside from dumpprivkey (not natively available in 2010 but can be done using wallet tools) or a copy of the wallet.dat itself.
If you can't find any of those backup, your coins outside of MtGox is out of the question.

AFAIK, Electrum is using a deterministic 'k' based from the private key and the hash of the message to be signed (actual formula, IDK).
So it'll produce the same 'k' for same message, thus same signature; but not if the message is different since it'll produce a different 'k'.
That's essentially not reusing nonce. [CMIIAW]

No, you'll be able to spend it again after getting dropped.

Note: it depends on the mempool of the node where your client is connected to; in case of Blockchain wallet, it depends if it's dropped from their nodes.
Also, the process depends on the client, some keep a local copy of the dropped transaction that requires manual deletion of the local copy but some are automatic.

But the key point is, you'll be able to spend it once it's dropped (approx 14days after it got received by the node), be it with intervention or none.
It rarely happens anyways.

Unfortunately, with a 4sat/vB tx fee, it's highly unlikely that it'll get confirmed within the next hour or so.
And no one can predict the future so it's hard to give an ETA to when it'll get mined, the good news is, mempools have been steadily decreasing in size these past few days.
It'll eventually get mined; if it's not a rush transaction, just wait it out.

One way to accelerate it is to perform a CPFP transaction with high fee.
But since Blockchain online wallet doesn't have such feature, you'll have to manually create a transaction that'll spend the change of that unconfirmed transaction.
Sadly, it doesn't have a coin-control feature so it might select a different input if you have other than that change.

Let me guess, it's: 5Km2kuu7vtFDPpxywn4u3NLpbr5jKpTB3jsuDU2KYEqetwr388P, right?
I'm sorry to tell you that it's the prvKey FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 which is out of range, invalid.

Sadly, no one can recover those 3.7 BTC that your "friend" accumulated: 1FYMZEHnszCHKTBdFZ2DLrUuk3dGwYKQxh