Edit: Wait, are you talking about a transaction? Where would you write a transaction and not click "send"?
Yes, imagine that I opened a request order, it is open now and I set it to receive XXX BTC, but I don't deposit, I let it open, and after some Years I finally use this adress to make a deposit.
Is this possible?
If you're using a normal wallet, yes, the addresses will be yours forever. The Blockchain wallet, for example mentions what addresses you have to accept Bitcoin from and gives you the option of archiving addresses so that you don't own them anymore. Basically, you can do what you want with the addresses forever - they're yours.