You could withdraw the proposal and resubmit it without the attachment (paying fresh connects for the second submission); there's no guarantee or way to confirm the prospect has not already seen or downloaded the attachment.
Helpful Tips
New Filters in Job Search
Over the next few weeks you may notice changes to Job Search filters that include the option to filter jobs by an hourly rate range and filter for jobs requiring multiple freelancers.
We are excited to share a new offering to enable freelancer job referrals (beta). This will provide the option to refer another freelancer on Upwork when you decline a job invite.
Explore the Events & Webinars page to find the latest webinars for new freelancers, to business growth webinars for experienced freelancers, and curated expert talks.
