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When workers decide they want union representation, the first step is signing union authorization cards. These forms show that workers are interested in collective bargaining and become the building blocks for organizing campaigns happening in workplaces across the country.

Canadian studies suggest that 17-26% of the union density gap between Canada and the US can be attributed to differences in authorization card and election procedures.

Notably, public sector workers maintain a 35.7% unionization rate compared to just 6.7% for private sector employees, with Black workers having the highest unionization rate at 13.2%.

Authorization cards are more than just paperwork - they're the first real action workers take toward building collective power. If you're running union drives, these cards become your essential tools for measuring support, meeting legal requirements, and building momentum throughout your organizing campaign.

The authorization card process can feel overwhelming when you're juggling multiple organizing drives without much help. Getting a handle on how these cards work, what legal protections you have, and how to collect them effectively - that's what separates successful campaigns from the ones that get stuck.

What are union authorization cards

Union authorization cards are written forms that employees sign to show their support for union representation in their workplace. When a worker signs an authorization card, they're expressing interest in having a union negotiate on their behalf with their employer for better wages, benefits, and working conditions.

Signing a union authorization card does not make someone a union member immediately. The card simply indicates that the worker wants the union to represent them in collective bargaining discussions with management. This distinction matters because workers often worry that signing commits them to union membership regardless of what happens next.

The cards ask for basic information like your name, job title, department, and signature, along with a statement saying you want union representation. Most authorization cards include language that says you're authorizing the union to represent you for collective bargaining purposes.

  • Authorization vs. membership: Authorization cards show you support representation, but actually joining the union happens after the union wins recognition and you decide to become a member

  • Legal purpose: These cards prove to labor boards that enough workers are interested in union representation to justify holding an election or pursuing recognition

  • Employee rights: Workers who sign authorization cards get federal law protection from employer payback - they can't fire you, demote you, or harass you for signing

authorization card for union

Why authorization cards build worker power

Authorization cards do more than meet legal requirements - they create visible proof that builds momentum for organizing campaigns. When workers see their coworkers signing cards, it creates a shift from individual frustration to collective action. This transformation from "I'm upset about working conditions" to "we're doing something about it" turns workplace complaints into organized movements.

Each signed card represents concrete evidence that workers are ready to take action together. When someone hesitant about joining the union effort sees that half their department has already signed authorization cards, they often move from the sidelines to active participation. This visible demonstration of solidarity breaks down the isolation that keeps workers from organizing.

The cards do more than just express individual support - they show everyone that collective action is real and happening right now. Seeing your coworkers stand together is incredibly powerful, especially in workplaces where people typically feel they have no voice alone.

  • Measuring support: Authorization cards provide organizers with real data about campaign strength across different departments, shifts, and job classifications

  • Legal foundation: Cards establish the basis for either filing for labor board elections or pursuing voluntary recognition from employers

  • Momentum creation: Visible progress through card collection gives hesitant workers concrete evidence that the campaign has broad support

Legal protections for workers who sign cards

Workers who sign union authorization cards receive comprehensive legal protections under federal labor law. The National Labor Relations Act protects most private-sector employees who engage in union activities, including signing authorization cards. These protections exist because workers cannot exercise their right to organize if they face punishment for expressing interest in union representation.

Many workers worry that signing an authorization card will expose them to their employer or put their job at risk. Federal law specifically protects this activity, and violations carry serious consequences for employers who try to interfere with organizing campaigns.

  • Confidentiality: Only the union and labor board can access signed authorization cards during organizing - employers have no legal right to see who signed cards or demand copies

  • Anti-retaliation: Federal law prohibits employers from firing, demoting, reducing hours, or otherwise punishing workers for signing authorization cards or discussing union representation

  • Voluntary participation: Workers have the absolute right to sign or decline to sign authorization cards without pressure from unions or employers

The National Labor Relations Board takes violations of these protections seriously. Workers can file unfair labor practice charges online, by phone, or at regional offices if employers violate their organizing rights. When employers break these rules, they can face orders to reinstate fired workers with back pay and post notices acknowledging their illegal conduct.

Workers also retain the right to revoke their authorization card signature before union certification is completed. This revocation typically requires written notice to the labor board and follows specific procedures that vary by jurisdiction and campaign stage.

How many cards do unions need for recognition?

The number of authorization cards required depends on which path to recognition organizers pursue. Understanding these thresholds helps unions set realistic goals and build strategy around concrete targets rather than guessing at support levels.

For National Labor Relations Board elections, unions need authorization cards from at least 30% of workers in the proposed bargaining unit. This threshold triggers the board's election process, where all eligible workers vote by secret ballot on whether they want union representation. The 30% showing of interest proves to the NLRB that enough workers support unionization to justify holding an election.

Most experienced organizers aim for much higher card counts before filing for elections. Campaigns that file with exactly 30% support often struggle during the election period, when employers typically launch intensive counter anti-union campaigns. Smart organizing strategy calls for collecting cards from 60-70% of workers before filing, providing a buffer against support erosion during employer pushback. Notably, 70% of Americans express approval for labor unions, with Democratic support at 94% compared to just 49% among Republicans.

Voluntary recognition requires authorization cards from a majority of workers in the bargaining unit - that means 50% plus one worker. When unions reach this threshold, they can approach the employer directly and request recognition without going through an NLRB election. If the employer agrees to voluntary recognition, the union becomes certified immediately. Workers are voting in favor of union representation at a rate of 74% through April 2024, representing the highest success rate in fifteen years.

Voluntary recognition requires authorization cards from a majority of workers in the bargaining unit - that means 50% plus one worker. When unions reach this threshold, they can approach the employer directly and request recognition without going through an NLRB election. If the employer agrees to voluntary recognition, the union becomes certified immediately.

Authorization cards remain valid for one year from the date of signing for NLRB purposes. This means if organizers collect cards slowly over many months, some of the earliest cards may expire before reaching the threshold. Successful campaigns typically aim to collect the bulk of their cards within a 3-6 month window to avoid timing problems.

authorization card form

Step by step card collection process

Running a successful card collection campaign requires systematic planning and execution. The difference between campaigns that hit their targets and those that stall often comes down to having clear processes for identifying supporters, explaining the authorization process, and maintaining momentum throughout the drive.

1. Identify potential supporters

Card collection campaigns start with mapping workplace support before presenting authorization cards to anyone. Successful organizers spend weeks listening to workers, identifying workplace issues, and building relationships before introducing the formal organizing process.

Start by having informal conversations during breaks, shift changes, and lunch periods. Ask open-ended questions about workplace conditions and listen for patterns in worker complaints. Workers who regularly voice frustration about management decisions, safety concerns, or unfair treatment often become early card signers.

2. Explain the authorization process clearly

When workers ask about getting a union card, providing a clear explanation determines whether they become active supporters or remain on the sidelines. Start every authorization card conversation by explaining that signing expresses interest in union representation, not immediate union membership.

Address common worker concerns directly. Workers typically worry about confidentiality, job security, and what happens if the union loses an election. Explain that federal law protects their right to sign authorization cards, that employers cannot access signed cards, and that they retain the right to vote however they choose in any future election.

3. Secure storage and tracking

You need to keep things confidential while still tracking how your card collection is going, which means having organized systems that keep worker information away from management. Collect authorization cards digitally through secure platforms like Solidarity Tech, which help protect worker data and streamline the process. Ensure that only authorized campaign staff have access to the digital system.

Sort cards by department, shift, or job classification so you can track progress across different parts of the workplace. This organization helps you spot areas where you need to put in more card collection work and gives you the data you need to make smart campaign decisions.

4. Follow up with signers

Collecting authorization cards marks the beginning, not the end, of worker engagement in organizing campaigns. Contact card signers within 48 hours of their initial commitment to thank them and provide next steps for campaign involvement.

Invite card signers to organizing meetings, workplace actions, and campaign planning sessions. Active participation in campaign activities strengthens their commitment and helps them become advocates who encourage other workers to sign authorization cards.

How Solidarity Tech helps union authorization card campaigns

Running authorization card campaigns across different worksites can quickly become a logistical nightmare for organizing teams. You're juggling contact lists, trying to remember who you've talked to, and coordinating volunteers - all while making sure sensitive information stays protected. Solidarity Tech's union membership management software tackles these headaches by putting everything in one secure place.

The platform brings all your worker contact information together with smart access controls that keep card signer details confidential while still letting your team coordinate effectively. You can track workplace-specific information like job classifications, departments, and how engaged each worker is without accidentally sharing sensitive details with people who don't need to see them.

  • Secure contact management: The CRM system holds worker information with detailed permissions, so only the organizers assigned to specific workers can see individual details while campaign directors get the big-picture progress reports they need

  • Multi-channel communication: Email, texting, and calling features work as a team to keep potential card signers engaged through targeted outreach based on their department, shift, or language preferences

  • Event coordination: The event system handles everything from organizing meetings to one-on-one conversations, with automatic reminders and attendance tracking that connects back to each worker's profile

The phonebanking and peer-to-peer texting tools help organizers systematically reach out to workers who showed interest but haven't signed cards yet. The predictive dialer cuts out the time volunteers waste listening to rings and voicemails, while guided scripts give them solid talking points about authorization card benefits and worker rights.

Progress tracking gives you real-time campaign visibility without putting individual workers at risk. The Activity Overview dashboard shows campaign-wide numbers like total cards collected and department breakdowns, so organizers can spot which areas have hit the 30% threshold for NLRB elections or the majority support needed for voluntary recognition.


Building lasting power beyond authorization cards

Successful authorization card campaigns create momentum that goes way beyond just winning that first recognition fight. The relationships you build while collecting cards, the organizing systems you put together, and the worker engagement you generate - all of that becomes the foundation for everything that comes next: contract negotiations, handling grievances, and taking action on workplace issues.

Authorization card campaigns help you spot the natural workplace leaders who step up during organizing conversations. These are often the workers who become shop stewards, join contract negotiation teams, and keep organizing by recruiting new members and keeping the union visible between formal campaigns.

The organizing skills developed during card collection - one-on-one conversations, workplace mapping, issue identification, and strategic planning - transfer directly to contract campaigns and ongoing union activities. These capabilities become the foundation for expanding union power beyond the initial workplace recognition.

Ready to streamline your union authorization card campaign? Schedule a demo to see how integrated organizing tools can support your card collection efforts and help build lasting worker power in your workplace.

Frequently asked questions about union authorization cards

Can workers revoke their union authorization card after signing?

Yes, employees can typically revoke their authorization by submitting written notice to the labor board before union certification is completed. The specific procedures and deadlines vary by jurisdiction and the stage of the organizing campaign.

Are electronic signatures valid for union authorization cards?

Electronic signatures can be legally valid for authorization cards if they meet specific authentication and security requirements under labor law. However, requirements vary by jurisdiction, so organizers should verify compliance with their local labor board before using digital card collection methods.

What happens if an employer tries to discourage workers from signing authorization cards?

While employers can express their views about unionization, they cannot threaten, coerce, or retaliate against workers for signing authorization cards. Workers should document any illegal interference and can file complaints with the National Labor Relations Board to protect their organizing rights.

Do authorization cards expire after a certain time period?

Authorization cards remain valid for one year from the date of signing for NLRB election purposes. Cards that expire before reaching the required threshold may need replacement signatures to maintain campaign viability and meet legal requirements for recognition.

Can part-time workers sign union authorization cards?

Part-time workers can sign authorization cards as long as they're part of the proposed bargaining unit for their workplace. Whether they're eligible depends on things like how many hours they work, what their job duties are, and whether they have enough in common with other workers in the unit.