Yes it is allowed since it is your own content. It would be a good idea to verify that it is your content.
Any reasonable verification method is accepted. Examples include:
- A post or tweet on an established facebook, twitter, Instagram or other social media account with a link to your contribution on Steemit.
- A reference to their Steemit account on their website or blog.
Thankyou very much, I will make sure I do this asap :-)