How to Exclude Users & Prevent Duplicate Entries

You post a Reddit giveaway. The rules are simple: one entry per person. But within hours, you notice the same usernames appearing in the comments five, ten, even twenty times. Some are clearly trying to boost their odds. Others may be running bots. A few are accounts that shouldn't be in the draw at all — moderators, your own account, or previously banned users.

If you pick a winner without addressing this, you've already broken the one rule that matters most: fairness.

Duplicate entries and ineligible participants are among the most common problems that undermine Reddit giveaways. They create an uneven playing field, frustrate honest participants, and can trigger accusations of a rigged draw — even if you had nothing to do with the manipulation.

The solution is a two-part filter: exclude specific users before the draw and deduplicate entries so each participant has exactly one chance to win.

RDT Picker handles both in one place. Before you run your draw, you can specify which accounts to remove entirely and activate the duplicate entry filter so each commenter is only counted once — regardless of how many times they commented.

This guide covers everything you need to know about why these filters matter, how to use them in RDT Picker, and the best practices for keeping your Reddit giveaway clean and defensible.

Why Duplicate Entries and Ineligible Users Are a Real Problem

Reddit is an open platform. Anyone with an account can comment on a public post, and nothing stops a determined user from commenting 50 times on your giveaway thread. Without filtering, your draw is quietly biased toward whoever comments most aggressively.

Here's the scope of the problem:

Duplicate comments stack the odds. A user who comments ten times has ten times the chance of winning compared to someone who follows the rules and comments once. That's not a giveaway — that's a race to see who can spam the most.

Bots can flood a thread. Some automated accounts are designed specifically to enter giveaways at scale. Without a user exclusion or duplicate filter, a bot farm can dominate your entire comment pool.

Ineligible accounts can enter undetected. Your own account, mod accounts, test accounts, or users you've previously disqualified can all enter without a filter in place. Including them in the draw looks unprofessional and can cause controversy if they win.

The Reddit community notices. Redditors are observant. If your giveaway results show a winner who commented fifteen times, or if a moderator wins a contest they helped organize, expect a public callout.

For a foundational overview of what makes a Reddit giveaway fair and rule-compliant, read: Are Reddit Giveaways Allowed? Reddit's Promotion Rules Explained.

Understanding the Two Key Filters

Before getting into the step-by-step process, it helps to clearly understand what each filter does and when to use it.

The Duplicate Entry Filter

The duplicate entry filter detects when the same Reddit username has left multiple comments on your giveaway post. When enabled, it counts only that user's first comment as their single valid entry — all subsequent comments from the same account are ignored.

This filter is essential for any giveaway that states "one entry per person" in its rules. Without it, your tool has no way to enforce that rule automatically.

When to use it: Enable it for every giveaway where your rules limit entries to one per person. It's virtually always the right choice.

The User Exclusion Filter

The user exclusion filter lets you manually specify Reddit usernames that should be completely removed from the draw, regardless of how many comments they left or what those comments said.

Common accounts to exclude:

• Your own Reddit account (the giveaway host)
• Moderator accounts for the subreddit
• Co-hosts or team members who helped organize the giveaway
• Previously disqualified users (e.g., from earlier giveaways or for rule violations)
• Known bot accounts you've identified
• Test accounts you used to verify the post format

When to use it: Use it in every giveaway where at least one account should not be eligible to win, regardless of their commenting activity.

Step-by-Step: How to Exclude Users and Filter Duplicates With RDT Picker

Step 1: Identify Who Should Be Excluded Before Your Giveaway Goes Live

The best time to think about exclusions is before you post. Make a list of every account that should not be eligible:

• Your own username
• Any account involved in organizing or moderating the giveaway
• Any account that has been previously disqualified from your giveaways

You don't need this list to post your giveaway — but having it ready means you won't forget anyone when it's time to run the draw.

Step 2: Post Your Giveaway With Clear One-Entry Rules

If your giveaway limits participants to one entry each, state it explicitly in your post. Clarity reduces confusion and also gives you the authority to disqualify multiple entries from the same user without controversy.

Example entry rule: "One entry per person. Multiple comments from the same account will only count as a single entry."

This preempts complaints from users who tried to enter multiple times and find their duplicates excluded.

Step 3: Let the Giveaway Run Its Course

Give your post time to collect entries. The more participants who follow the rules correctly, the healthier your entry pool will be. For most giveaways, 24–72 hours is a reasonable window.

Step 4: Open RDT Picker and Paste Your Post URL

Go to RDT Picker and paste the full URL of your Reddit giveaway post into the input field. The tool will fetch all comments from the post in seconds.

Step 5: Enable the Duplicate Entry Filter

In the settings panel, locate the option to filter out duplicate entries or count only one entry per user. Enable this filter. From this point, RDT Picker will identify every unique Reddit username in your comment pool and ensure each one is counted only once — using their first comment as the valid entry.

This single step enforces your "one entry per person" rule automatically across every comment, regardless of how large your comment pool is.

Step 6: Add Accounts to the Exclusion List

Look for the user exclusion or exclude accounts field. Enter the usernames you identified in Step 1 — the giveaway host, moderators, co-organizers, and any previously disqualified users.

RDT Picker will remove all comments from those accounts from the eligible pool entirely. Even if a listed account left ten comments, none of them will be included in the draw.

Step 7: Apply Any Additional Filters

Depending on your giveaway rules, you may want to combine the exclusion and duplicate filters with:

• Keyword filter: Only count comments that include a required entry phrase
• Minimum comment length: Exclude very short comments that may be spam or accidental presses
• Comment score filter: Set a minimum upvote threshold if community validation is part of your entry criteria

Layering filters creates a tighter, more defensible eligible pool and gives you a stronger answer if anyone questions the draw.

Step 8: Run the Draw and Announce Winners

With all filters applied, click to pick your winner(s). RDT Picker will select randomly from your cleaned, filtered comment pool. Share the results in your thread, and consider noting publicly that you used the duplicate filter and user exclusion list — this level of transparency builds community confidence.

For more detail on how to announce and handle results, see: Reddit Comment Picker – Select the Winners Randomly.

What Counts as a Duplicate Entry?

A duplicate entry is any comment from a Reddit username that has already appeared in your giveaway post. The definition is simple: same username, more than one comment.

RDT Picker's duplicate filter uses the commenter's unique Reddit username as the identifier. This means:

• If a user comments "ENTER" three times, only their first comment counts.
• If a user comments "ENTER" once and then follows up with "any update on the giveaway?", their first comment still counts — and the follow-up is excluded.
• If two different accounts submit identical comments, both are valid entries (they're different users).

This approach is both technically correct and fair — the username is the definitive identifier for a Reddit account, and the first comment is the most logical entry to honor.

What about reply comments? RDT Picker gives you the option to include or exclude nested replies. For most giveaways, filtering to top-level comments only is cleaner and reduces the risk of counting conversational replies as entries. If a user replied to someone else's comment with the entry keyword, it's debatable whether that should count — defaulting to top-level only removes the ambiguity.

How to Handle Edge Cases

A user says their duplicate comments were accidental

This happens, especially on mobile where double-posting is common. The fairest policy is to stick to the filter — their first comment counts, subsequent ones don't. State this in your rules upfront ("duplicate comments will be filtered automatically") and you won't face pushback.

A bot account slipped through the filter

The duplicate filter removes entries from the same account — but if a bot network is using many different accounts, each account would still be counted as a unique entry. In this case, use the user exclusion list to manually remove any accounts you've identified as bots. For large giveaways, scanning your comment list for obviously new or low-karma accounts before running the draw is a useful precaution.

Someone claims they should have been excluded but won anyway

Exclusions are based on the list you provide before the draw. If you forgot to add an account to the exclusion list and that account wins, you have two options: honor the win if the person is legitimately eligible, or rerun the draw with the corrected exclusion list and explain publicly why you're doing so. Transparency is your best defense here.

A moderator or team member wants to enter the giveaway

This is a judgment call. If your subreddit or brand runs giveaways regularly, it's cleanest to exclude all team members by default. If a team member genuinely wants to be eligible, consider disclosing this in your giveaway post so the community is aware.

Why These Filters Are Non-Negotiable for Professional Giveaways

Brands, moderators, and content creators who run Reddit giveaways repeatedly know that reputation compounds. A clean, transparent giveaway builds trust that carries forward. A sloppy one — where duplicates weren't filtered or a team member accidentally won — gets screenshotted and posted to subreddits dedicated to calling out bad actors.

The user exclusion filter and duplicate entry filter are not optional extras for serious giveaway runners. They're baseline requirements for any draw that stakes its credibility on fairness.

RDT Picker includes both as standard features, available for free, with no account needed. The setup takes under a minute, and the protection it provides is permanent — every draw you run with these filters in place is a draw you can defend completely.

For a deeper look at what the platform offers and how it's designed, visit the About RDTPicker page.

Best Practices Summary

Before the giveaway:

• Prepare your exclusion list: host account, moderators, co-organizers
• State the one-entry-per-person rule clearly in your post
• Note that duplicate comments will be filtered automatically

During the giveaway:

• Monitor for obvious bot activity and note any accounts to manually exclude
• Do not edit the entry requirements after the post goes live

When running the draw:

• Always enable the duplicate entry filter for single-entry giveaways
• Add all prepared accounts to the exclusion list before running
• Combine with keyword and comment length filters where applicable

After the draw:

• Announce winners publicly in the thread
• Mention that duplicate filtering and user exclusion were applied
• Screenshot your settings for your own records in case of disputes

Final Thoughts

Duplicate entries and ineligible users are the two most common integrity risks in Reddit giveaways — and they're both entirely preventable. The duplicate entry filter and user exclusion list in RDT Picker handle both automatically, before the draw even runs.

The process is straightforward: prepare your exclusion list, post your giveaway with clear one-entry rules, load your post URL into RDT Picker, enable the duplicate filter, add your exclusion list, and run the draw. The eligible pool that remains is clean, fair, and fully defensible.

That's the standard your Reddit community expects. RDT Picker makes it easy to meet it every time.

Start your next giveaway the right way — head to RDT Picker and run your draw for free today.