https://ccbill.com/support/multiple-submissions
Multiple Submissions Message
Nov 17, 2022 - If you attempted a series of transactions using CCBill, you will get a multiple submissions message. Learn how to avoid this in the future.
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https://www.writersdigest.com/getting-published/what-are-multiple-submissions-in-writing-and-publishing
What Are Multiple Submissions in Writing and Publishing? - Writer's Digest
Apr 30, 2021 - Learn what multiple submissions in writing and publishing are from editor Robert Lee Brewer, including when writers should make them (if ever) and why they...
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