I sent 20 xrp from poloniex to an adress but i checked on the blockchain and there is 0 balance after 2 hours from transaction, noting was received.
Also it says "Inactivated address".
The receiver should do something to activate the adress?
on poloniex it says "processing"
You might be withdrawing XRP in the wrong way I think it should include the destination tag without it you won't receive anything from your wallet.
Have you added the tag? If not then this might be the reason.
If you are using poloniex you should learn what are destination tag
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https://support.poloniex.com/hc/en-us/articles/360043556833-What-is-a-Payment-ID-Memo-Destination-tag-MessageIf that is not the issue then better contact poloniex.