user103616: After withdrawing bitcoin from a site I use I sent it straight to another site with a generated address, on my site it said it was completed but was never received on the other site. The three addresses are 
1BVLvno6UX8Rn3KtAQgJcpcZca58bcjVc6  
8uskrzBQKwbhWHL7LYFMAD5yCNH6vTLnj   
37eHZRcG9G3q3ZE7a3x5qYmWnhFeiThnKR

user13866: 
I sent it straight to another site

Evidence suggests not.

At the time of writing, none of those addresses has any history of transactions in the public blockchain for Bitcoin (BTC). The second address 8usk...TLnj does not appear to be a valid Bitcoin P2PKH, P2SH or Bech32 address
Therefore the "site" you "withdrew" Bitcoin from, or your subsequent "sent it" (if a separate transaction), did not actually create a transaction (or at least, not a transaction that was both valid and had a sufficient transaction fee).
Consequently the money is still in its original location.
You can check addresses and transaction-IDs at any public "blockchain explorer". I suggest trying several to be more confident of the information returned.

If I add a 3 to the start of your second address 8uskrzBQKwbhWHL7LYFMAD5yCNH6vTLnj this makes a valid Bitcoin P2SH address which currently has been used in six transactions in recent days. None of those transactions involve the other addresses in your question.

103616: <p>After withdrawing bitcoin from a site I use I sent it straight to another site with a generated address, on my site it said it was completed but was never received on the other site. The three addresses are </p>

<p>1BVLvno6UX8Rn3KtAQgJcpcZca58bcjVc6  </p>

<p>8uskrzBQKwbhWHL7LYFMAD5yCNH6vTLnj   </p>

<p>37eHZRcG9G3q3ZE7a3x5qYmWnhFeiThnKR</p>
 13866: <blockquote>
  <p><strong>I sent it straight to another site</strong></p>
</blockquote>

<p>Evidence suggests not.</p>

<hr>

<p>At the time of writing, none of those addresses has any history of transactions in the public blockchain for Bitcoin (BTC). The second address <code>8usk...TLnj</code> does not appear to be a valid Bitcoin P2PKH, P2SH or Bech32 <a href="https://en.bitcoin.it/wiki/Address" rel="nofollow noreferrer">address</a></p>

<p>Therefore the "site" you "withdrew" Bitcoin from, or your subsequent "sent it" (if a separate transaction), did not actually create a transaction (or at least, not a transaction that was both valid and had a sufficient transaction fee).</p>

<p>Consequently the money is still in its original location.</p>

<p>You can check addresses and transaction-IDs at any public "<a href="https://www.google.com/search?q=blockchain+explorer" rel="nofollow noreferrer">blockchain explorer</a>". I suggest trying several to be more confident of the information returned.</p>

<hr>

<p>If I add a <code>3</code> to the start of your second address <code>8uskrzBQKwbhWHL7LYFMAD5yCNH6vTLnj</code> this makes a valid Bitcoin P2SH address which currently has been used in <a href="https://btc.com/38uskrzBQKwbhWHL7LYFMAD5yCNH6vTLnj" rel="nofollow noreferrer">six transactions</a> in recent days. None of those transactions involve the other addresses in your question.</p>
