You should always own the private key associated to this address so you can sign a message to confirm its ownership.
This is my btc address shown in an unedited (quoted) post, in the way to secure the ownership of this account Kavelj22
For reference:
Kavelj22 Bitcointalk" Stake my btc address". Today is January 24-2018
-----BEGIN SIGNATURE-----
12twFsAZ66kegEmb3vLaWfcjgrzNmokzjU
H9WEE/Y+W4dfDJM88ngOFf4uG37Jy1aWrqAPjUUtBH2ZMHiXEQxo8V9qTpo33pTe/DOHpzZ29+bxJRMuER+ubnA=
-----END BITCOIN SIGNED MESSAGE-----
Thanks for quote
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A correct form:
Kavelj22 Bitcointalk" Stake my btc address". Today is January 24-2019
-----BEGIN SIGNATURE-----
12twFsAZ66kegEmb3vLaWfcjgrzNmokzjU
H2N/pHLbEVogw7SI/1XqgNFgF05A/WSFJ3+mpUzhTcF6LsnN1vIIou0L86DIcTa0mPSbhSTVIMcPwFsd83fzsnU=
-----END BITCOIN SIGNED MESSAGE-----
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You need a cup of coffee