Solving the Double Submission Issue

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Real life situation: placing bets on a betting website. Users would double click and get two bets placed. Not good! Javascript checks were not sufficient to prevent this.

Solution:

  1. Create UUID/GUID hidden input in form using server-side scripting language that renders the form.

  2. On form submission immediately add this to a database table called UniqueSubmissions (for example). Then proceed with processing.

  3. Every subsequent request with the same UUID/GUID will be rejected if found in the UniqueSubmissions table.

This worked for us. Hope that helps answer your question!

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