Welcome on the forum 
You can check out this link : https://bitcointalk.org/index.php?topic=703657.0 is not official but if you follow this rules/guidelines all will be fine
You can check out this link : https://bitcointalk.org/index.php?topic=703657.0 is not official but if you follow this rules/guidelines all will be fine4. No referral code (ref link) spam. [1]
I can't understand if I can use them in my signature
