You open an app, connect your wallet, complete an action, and disconnect. The session appears to be over.
Yet a permission you approved earlier may still exist.
Understanding why starts with a distinction that is easy to miss: connecting a wallet, approving token access, and disconnecting from a website are separate actions.
A connection is not a spending permission
Connecting a wallet usually lets an application see your public address and request actions through your wallet. That connection alone does not give the application permission to spend your tokens.
A token approval goes further. On Ethereum and compatible networks, it can authorize a particular smart contract to move a specified token, up to an approved amount.
That means “Connect” and “Approve” should never be treated as interchangeable buttons. They serve different purposes.
Why an approval can outlast your visit
Imagine using an application once and then closing it for several months.
If you granted a token allowance, leaving the website does not necessarily remove it. A standard Ethereum token allowance can remain available until it is used, changed, or revoked.
Some applications request a very large allowance to reduce the need for repeated approvals. That can make future interactions more convenient, but it also increases the amount exposed if the authorized contract is malicious or becomes compromised.
Disconnecting the website ends the connection in your wallet interface. It does not, by itself, cancel that on-chain allowance.
What to read before pressing “Approve”
A token approval is easier to assess when you can answer three questions:
Which token does this permission cover?
Which address receives permission to spend it?
What spending limit am I authorizing?
For example, permission to spend a particular token is different from permission to spend every asset in a wallet. The scope matters, and the confirmation screen deserves more attention than the website’s button label.
Disconnecting and revoking do different jobs
Reviewing existing allowances can help you identify permissions left behind by applications you no longer use.
Revoking a standard token allowance requires an on-chain transaction and generally a network fee. It removes that particular spending permission; it does not reverse past transfers or recover assets already lost.
The useful habit is to understand what each confirmation authorizes—and remember that leaving a website does not necessarily end the permission you granted it.
This article is for educational purposes only and does not constitute investment advice. It does not recommend any cryptocurrency, wallet, or trading platform.