You sent crypto to the wrong address. What can actually be done?
An honest account of which mistakes are recoverable and which are not, and what to do in the hour after it happens.
The honest answer depends entirely on where the funds went, and in most cases it is not good. Here is how to tell which situation you are in rather than hoping.
Recoverable: a service's address, wrong network
If you sent to an exchange or a custodial service but on a network it does not credit, the funds are in an address that company controls. Some have a recovery process, sometimes for a fee, usually slow.
This is worth pursuing. Open a ticket with the transaction ID, the amount, the network you used and the network you intended. Be patient and precise; the people handling it see this constantly.
Recoverable: you know the recipient
If the address belongs to a person or business you can contact, you are asking a favour rather than invoking a mechanism. Many people return funds when asked politely and shown proof.
Not recoverable: a stranger's address, or none
A valid address belonging to someone you cannot identify means the funds are theirs. No support team, wallet developer or blockchain has the power to move them back.
An address that exists on a chain where nobody holds the keys is worse: the funds are not even owned, just permanently stranded.
In both cases the answer is that it is gone. Anyone who contacts you offering to recover it for a fee is running a second scam on top of your first loss. Recovery services for this do not exist, because the thing they claim to do is mathematically impossible.
The hour after
Save the transaction ID before anything else. Check it on an explorer and note the destination address exactly.
Work out which case above you are in. That determines whether to open a ticket or to stop spending effort.
Then change the habit that caused it — almost always copying an address from history, retyping one, or not re-checking the network on the sending side. The mistake is cheap to prevent and impossible to undo, which is why the habits matter more than the knowledge.