Joanne Marie P wrote:
Yes, you can attach samples of the work you have previously completed on your proposals. Please let us know if you have other questions. Thank you!
Joanne, that's not what the OP is asking - OP, please do not attach completed work - many clients will just take your idea and have someone recreate it at perhaps a lower price, or figure out a way to get rid of your watermark.
Attach relavent samples or direct them to view your portfolio. DO NOT send them the job ... watermarks are no guaranteea and you end up working for nothing. You don't get paid and Upwork doesn't get their fee. There's no point. That's what a portfolio is for.