A deposit address looks like a simple destination. A person opens an exchange or wallet, copies the address, and assumes it will behave like a bank account number forever. In crypto, that assumption can be wrong in several different ways.
Some deposit addresses rotate for privacy. Some older addresses may still remain associated with the account. Some exchange-generated addresses can expire. Some assets also require more than the address alone, such as a memo or destination tag. This means the real question is not “what is my deposit address?” The better question is “what are the current deposit instructions for this asset on this platform right now?”
That distinction matters because deposit mistakes are usually not caused by bad intentions or advanced technical problems. They are caused by treating a deposit address like a permanent universal destination when the platform’s rules are more specific than that.
The exchange or wallet may also care about the network, whether the address is still active, whether an old address is still associated with the account, and whether a memo or destination tag is required. That is why the live receive flow matters more than memory, screenshots, or old notes.
Coinbase’s receive instructions make this practical point directly by telling users to select the asset, select the network, and then use the populated address and destination tag or memo if required. Kraken’s deposit instructions make the same kind of point when they tell users to choose the crypto, choose the network where relevant, generate the address if needed, and copy both the address and any additional required information.
A deposit address is therefore not just a piece of text. It is the current output of a platform’s deposit process.
Deposit addresses can change for more than one reason. On some platforms, the address rotates regularly for privacy or custody-management reasons. Coinbase automatically generates a new address after every transaction or when funds are moved between the wallet and Coinbase storage in order to protect privacy.
That kind of change does not necessarily mean the older address stops working immediately. It does mean the user should stop assuming that the last address seen is always the current preferred route.
Other platforms allow the user to generate multiple deposit addresses and may begin expiring older ones if too many are created. Kraken’s generating-new-addresses guidance states that there are no limits to how many times a deposit address can be used, but generating more than five deposit addresses for the same cryptocurrency will cause older addresses to expire. Kraken’s current deposit-address expiry guidance adds that an address marked as New Address or Used Address is okay to deposit to, while an expired address is not guaranteed to be credited and may be permanently lost.
This is why “it worked before” is not a strong enough reason to reuse an old exchange deposit address without checking.
A self-custody wallet often continues to control older receive addresses even if the app shows a new one for privacy. Blockchains, such as Bitcoin, may automatically rotate wallet addresses for privacy, and that a verification tied to one address applies only to that address, not to other addresses associated with the wallet. This is a good reminder that the wallet may continue to recognize multiple addresses even while presenting a new preferred one.
On exchanges, old addresses may also remain associated with the account in some cases. Coinbase Exchange says previously generated addresses remain associated with the account and can still be checked under Crypto Addresses in the profile, and it says that if tokens are sent to an old address, they will be processed and credited automatically into the corresponding wallet of the default portfolio.
The important beginner lesson is simple. “The address changed” does not automatically mean “the old one is invalid,” but it also does not mean “the old one is always safe to reuse.” The platform’s current rules decide that.
Even when a platform keeps historical addresses associated with the account, using the live receive flow is still safer.
The reason is not only technical validity. It is also routing accuracy. The asset may now be received on multiple networks. The platform may now show a destination tag or memo that matters. The platform may have changed support for a particular route. Or a previous address may have become awkward to verify because it was copied from history rather than generated from the current receive instructions.
A person may save an old exchange address in notes, or reuse an address copied from a previous deposit, and assume the job is done. The platform may now expect a different network, may show a memo or destination tag, or may have marked an older address as expired. At that point, the problem is not the visible address format. The problem is that the deposit instructions were incomplete.
This is why the strongest habit is always returning to the receive screen for the asset and platform involved before sending.
The first check is whether the asset and network match exactly what the destination supports.
The second check is whether the platform says the address is current, reusable, historical, or expired.
The third check is whether any extra routing field is required, such as a memo or destination tag.
The fourth check is whether the deposit amount is above any platform minimum, because some exchanges may not credit very small deposits normally.
The fifth check is whether the route is important enough that a small test transfer makes sense before the main amount is sent.
These checks sound basic, but they prevent most avoidable deposit confusion because they force the sender to treat the deposit as a full route instead of a copied string.
A self-custody wallet and an exchange do not have the same job.
A self-custody wallet is generally showing addresses controlled through the wallet’s own keys, and multiple addresses may remain tied to that wallet over time. An exchange is operating a custodial system that may manage privacy, storage, internal routing, and account crediting differently. Therefore, exchange addresses are custodial addresses and users do not have access to the private keys of those addresses.
This difference helps explain why exchange deposit addresses often deserve more caution than beginners expect. They are part of a platform system, not just a direct wallet identity.
The safest beginner rule is simple: never send to a deposit address from memory.
Always open the current receive flow for the exact asset, check the exact network, copy the live address, and include any extra field the platform shows. If the platform offers history or previously used addresses, treat that as a reference tool, not as permission to skip the current checks.
Deposit addresses are not all permanent, and they are not all temporary in the same way. Some change automatically for privacy. Some older ones may still remain associated with the account. Some exchanges allow repeated use until older addresses begin to expire. The only reliable answer comes from the current rules of the platform receiving the funds.
For a beginner, the safest path is always the same. Use the live deposit flow, confirm the asset and network, check whether the address is still valid, and do not assume that an old address or saved screenshot still tells the whole story. In crypto deposits, most confusion starts when the address is treated like a timeless identity instead of a current instruction.
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