user136067: I have a receiving address which was used in 2017,someone said they sent me coins to that address 5 years later (today) is that address still mine,its showing nothing since last time i used in 2017?

user132451: Addresses are forever. If someone sends sats there, then anyone with access to an up-to-date blockchain explorer can verify if the transaction successfully completed.
Owning . It's difficult to know if you're the only owner, but verifying you have a key is easy
"Ownership" of an address really just means control, "being in unique possession of a corresponding private key". In other words, whoever knows the private key for an address can spend any coins there.

136067: <p>I have a receiving address which was used in 2017,someone said they sent me coins to that address 5 years later (today) is that address still mine,its showing nothing since last time i used in 2017?</p>
 132451: <p>Addresses are forever. If someone sends sats there, then anyone with access to an up-to-date blockchain explorer can verify if the transaction successfully completed.</p>
<p>Owning . It's difficult to know if you're the only owner, but verifying you have a key is easy</p>
<p>&quot;Ownership&quot; of an address really just means control, &quot;being in unique possession of a corresponding private key&quot;. In other words, whoever knows the private key for an address can spend any coins there.</p>
