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You need to get a memo from our site too.

Thanks, for getting back to me. Sorry, I'm not very tech-savvy. Can I, please, ask you to break it down for me, step-by-step, so I don't make any foolish mistakes? Thank you🙂

On this page, look for the section called "Trading Steem/SBD" (last section on page): https://blocktrades.us/en/support/home/help/trading

Just tried and got error message: Missing Active Authority silly-einstein

It sounds like you're trying to send from silly-einstein. You should be sending from your account
yahialababidi to silly-einstein

Yay, it worked :) Thank you, for your patience & being there!