How to Merge Duplicates in 1CRM
Eliminate duplicates in 1CRM and stop messy data from slowing your sales.
Published on September 20, 2025
Duplicate contacts are more than just a minor annoyance; they're a silent drain on your sales pipeline. When your CRM is cluttered with redundant data, it leads to confusion, wasted effort, and a disjointed customer experience. At Add to CRM, we know that clean data is the foundation of an efficient sales process. In this guide, we'll walk you through how to clean up existing duplicates in 1CRM and, more importantly, how to prevent them from ever being created.
Why Duplicates Hurt Your Sales Process
Duplicate records can quietly sabotage your sales and marketing efforts. They create skewed analytics, making it impossible to get a clear picture of your pipeline. Worse, they can lead to multiple sales reps contacting the same prospect, which looks unprofessional and wastes valuable time. Common causes include manual data entry errors, inconsistent formatting during list imports, and a lack of standardized data entry processes across your team.
Identifying Duplicates in 1CRM
Finding duplicates is the first step to a cleaner database. While some CRM systems have advanced, automated duplicate detection tools, you can always start with manual methods in 1CRM.
- Use the Search Function: The simplest way to find potential duplicates is to search for contacts using a unique identifier. Search the Leads or Contacts module by email address, phone number, or a combination of first name and company name. If you get multiple results for the same person, you've found your duplicates.
- Check for Built-in Tools: Review your 1CRM documentation or settings for a feature often named "Find Duplicates" or "Duplicate Management." These tools can help you scan your entire database based on specific criteria, making the identification process much faster.
Step-by-Step Merging Process
Once you've identified a set of duplicate records, you need to merge them carefully to preserve the most accurate information. While the exact interface may vary, the principles are universal.
- Select the Duplicates: From your list view, select the two or more records you want to merge.
- Find the Merge Action: Look for a "Merge" button or an option within an "Actions" menu.
- Choose a Primary Record: You will typically be asked to designate one record as the "master" record. This is the record that will remain after the merge is complete.
- Review and Select Data: The system should display the data from all records side-by-side. Carefully go through each field (like email, phone, title) and select the most current and accurate information to keep in the final, merged record.
- Confirm the Merge: Once you are confident you've selected the best data from each record, confirm the action. 1CRM will combine the records, linking all related activities, notes, and opportunities to the single master record.


Bulk Duplicate Management
For larger-scale cleanup projects, manually merging records one by one isn't practical. Check if your 1CRM plan includes a bulk duplicate management tool. These features often allow you to review and merge dozens or hundreds of duplicate sets from a single screen, sometimes with rules-based automation to speed up the process. This is a powerful way to tackle a database that has accumulated duplicates over time.
Preventing Duplicates with Link1CRM
Link1CRM is a Chrome extension that finds verified contact information from LinkedIn and adds standardized data to 1CRM. While cleaning up duplicates is a necessary task, preventing them is a far more effective strategy. Our tool helps you build a clean database from the start by eliminating the root cause of most duplicates: manual data entry errors.
Why Clean Data Beats Cleanup
Think about the hours your team spends finding and merging duplicates. It's a reactive, repetitive chore that takes them away from selling. By using Link1CRM, you adopt a proactive approach. Our extension provides verified, consistently formatted data with every new contact, ensuring your CRM stays clean and reliable. This means your team can trust the data and focus on what they do best: building relationships and closing deals.
Getting Started with Link1CRM
It only takes a few minutes to get started:
- Install the extension from our website at https://addtocrm.com/1crm.
- Navigate to a prospect's profile on LinkedIn.
- Use the Link1CRM button to find their verified contact information.
- Click "Add to CRM" to send clean, standardized data directly into 1CRM with a single click.
LinkedIn Integration for 1CRM: Avoid Duplicates Before They Happen
Our most powerful feature for preventing duplicates is our real-time LinkedIn integration. When you're viewing a profile on LinkedIn, Link1CRM automatically checks if that person already exists in your 1CRM database. This simple check stops duplicates before they are ever created.
Enriching Existing Contacts
If a contact is already in your CRM, our tool doesn't just stop you from creating a duplicate. It allows you to enrich the existing record. You can update their job title, add a new verified email, or sync their latest LinkedIn profile information. This ensures your data is not only clean but also current, all without creating new, conflicting records.
Real-Time Duplicate Prevention
This in-the-moment feedback is a game-changer for prospecting. Your sales team can instantly see whether a person on LinkedIn is a net-new lead or an existing contact. This simple visual cue on the LinkedIn profile page guides them to either add a new lead or enrich an existing one, making duplicate creation a thing of the past.
Best Practices for Duplicate Prevention
Beyond using a great tool, a clean database relies on good habits. Here are a few best practices to implement with your team:
- Establish Data Entry Standards: Create a simple guide for your team on how to format names, job titles, and company information consistently.
- Control Data Imports: Limit which team members can perform bulk data imports, as these are a common source of widespread duplicates.
- Schedule Regular Audits: Set aside a small amount of time each quarter to scan for any duplicates that may have slipped through.
- Train Your Team: Make sure everyone on your team understands the importance of data quality and the processes you have in place to maintain it.
Conclusion: Build Clean, Not Cleanup
Managing duplicates in 1CRM is an important skill, but the best strategy is to prevent them from cluttering your database in the first place. Cleaning up data is a reactive chore; building with clean data is a proactive strategy for growth. By automating data entry and preventing duplicate creation in real-time, you empower your sales team with a reliable, single source of truth.
Stop wasting hours on data cleanup. Start building a powerful sales engine with clean, verified data from day one. Try Link1CRM for free today and see the difference it makes.
Save 4hrs / week in 1CRM.
Find verified contact info for your prospects on the #1 Business Social Network & add them to your 1CRM.


Trusted by 1000s of founders, SDRs & more