Not at all.
You could add 'Credit to show I made it for you: Yes/No' like in SAO's form, just in case someone doesn't want it, but it'd be kinda disrespectful if they don't show credit to you anywhere ;p
You could add 'Credit to show I made it for you: Yes/No' like in SAO's form, just in case someone doesn't want it, but it'd be kinda disrespectful if they don't show credit to you anywhere ;p