He will see when he open his account again. 
How to send message to closed accounts
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I was sent 3 messages when I had my account closed.
cottonsock wrote:
Why would they want to re-open their account, after closing it ?
Why? Some people would like to stop wasting time for a moment.
Some of my friends also " deactivate facebook account for a while".
You've been here for 5 years...!
I'm sorry, permanent? I am not sure what you mean by that.
Okay. I think I know where this is going. Oh and, I feel like you're underestimating my age. Right? That's what most people do when they see my video game character in my picture. It is a way of thinking, don't worry about it. 
Jun 24, 2018
0
#11
camter wrote:
I am thinking of closing my account. Will I get begging letters not to?
you'll need to start a separate thread about it. and don't piss off the kids here, as they'll be the ones to spam emojis about missing you the most without even having ever chatted with you at all.
*sniff* i miss you already. don't go! 
oh, you're still here ...
cottonsock wrote:
Why would they want to re-open their account, after closing it ?
I did....kinda.
Jun 25, 2018
0
#14
Postafi wrote:
Well I thought he did, but it sort of disappeared. Has he closed his account?
A few months ago, I saw this question , someone asking how to send message to closed accounts.
Here are my tips,
Search his name--->explore one of his game>>>>click on his name-----> click send message option.