I just tested it in testnet4 Electrum and it accepts any address from other wallets.
Thank you for testing that.
I don't know what @3robins meant by "pre-script" though.
He probably meant what we prepend to the private key to specify the script type in electrum, like "p2wpkh-p2sh:"
Yes, correct.
You can enter your friend's address in the sweep window and all the funds in the paper wallet will be sent to that address. You don't need to add any prefix to the address. Prefixes are only added to private keys but you don't need to do that either.
Excellent, so I have the green light at bottom right corner to show Electrum is connected to server, enter my paper private key that starts with a "5" into sweep window, then enter my friends wallet address that begins with "bc1" into the "send to address" at bottom of the window, then click the sweep button.....
Now, what should I expect to happen after that? I'm not interested in setting or negotiating lower fees, I would prefer to use the default fee structure because I don't want to low-ball, that might cause delays and I prefer an efficient transaction (I don't mind paying the fee).
PS: Also have an unrelated question..... I have another paper wallet from the same era, generator, and coding, but it has zero balance. I would like to use this paper wallet for the test run, so could I have my friend send me $200 to this old paper wallet address using his own transfer methods, then once there are X amount of confirmations I could use this old paper wallet that now has a fresh $200 balance to send that back to my friend via the Electrum sweep function as a test run, correct?