user139978: I sent $500 in Bitcoin and Ethereum to my niece email address. She got an email for each but could not cash them without Transaction Hash (TXN ID) as I was told by her exchange company! Is there any way I or she can get the money ($1000)? Appreciate help in advance!

user13866: The normal way to send Bitcoin to someone is to send it to a Bitcoin address, not to an email address. This means the transaction is handled by the Bitcoin network and has a Bitcoin transaction-ID (transaction-hash).
When you use an exchange such as Coinbase to send Bitcoin to an email address, this is "off-chain" - it isn't a true Bitcoin transaction and doesn't have a Bitcoin transaction-ID (transaction-hash).
The recipient probably needs an account on the same exchange. Only the exchange can advise whether opening an account will allow the receipt of money sent to an email address weeks earlier.

139978: <p>I sent $500 in Bitcoin and Ethereum to my niece email address. She got an email for each but could not cash them without Transaction Hash (TXN ID) as I was told by her exchange company! Is there any way I or she can get the money ($1000)? Appreciate help in advance!</p>
 13866: <p>The normal way to send Bitcoin to someone is to send it to a Bitcoin address, not to an email address. This means the transaction is handled by the Bitcoin network and has a Bitcoin transaction-ID (transaction-hash).</p>
<p>When you use an exchange such as Coinbase to send Bitcoin to an email address, this is <a href="https://help.coinbase.com/en/coinbase/trading-and-funding/cryptocurrency-trading-pairs/how-to-send-and-receive-cryptocurrency" rel="nofollow noreferrer">&quot;off-chain&quot;</a> - it isn't a true Bitcoin transaction and doesn't have a Bitcoin transaction-ID (transaction-hash).</p>
<p>The recipient probably needs an account on the same exchange. Only the exchange can advise whether opening an account will allow the receipt of money sent to an email address weeks earlier.</p>
