Skip to content
trimble-pay-blog-unconditional-lien-waiver-2560x768
Best Practices

What is an unconditional lien waiver?

3 minutes read
|
January 31, 2023

Share this post:

Summary

Some projects present more challenges or financial risks than others. In light of this, it's essential to understand what unconditional lien waivers are and how to use them.

Lien waivers are contracts designed to protect contractors and property owners during construction projects. The documents protect contractors in the event they are not paid. As such, contractors use them in high-risk situations to protect their businesses. Accordingly, unconditional lien waivers are unavoidable. After all, some projects present more challenges or financial risks than others. In light of this, it's essential to understand what unconditional lien waivers are and how to use them.

What are unconditional lien waivers?

An unconditional lien waiver is a legal document that signifies that a contractor received payment for their work. It is a type of document that goes into effect immediately upon signing. As a result, it uses the past tense. Or in other words: when a subcontractor signs an unconditional lien waiver, they agree that they received payment. This agreement then waives their right to file a lien.

What types of unconditional lien waivers are there?

Unconditional lien waivers come in two types of waivers.

  • A partial unconditional lien waiver outlines specific services and the contractor's pay.

  • A final unconditional lien waiver signifies that all work has been completed and paid for on a project.

Once these are signed, the contractor who signed it no longer has the right to file a lien on the property.

When to use unconditional lien waivers

General contractors issue unconditional lien waivers for many reasons. Some of these include:

  • Projects with high financial risk

  • When using a new subcontractor

  • Subcontractors with quality issues in the past

Unconditional lien waivers go into effect immediately, so contractors should only sign them once they have received payment. Also, subcontractors will want to check that the amount they received is correct. Only when the money is in the bank should subcontractors sign away their lien rights.

trimble-pay-blog-contractor-office-laptop-1060x700

The risks of unconditional lien waivers

For subcontractors

Unconditional lien waivers go into effect immediately. Or in other words- if a subcontractor signed a lien waiver before they got the payment, they couldn't file a lien. For example, a subcontractor might receive a check from their general contractor and sign the lien. However, when the bank processed the check, the check bounced. Even though they didn't get paid because they signed the lien waiver, the subcontractor would not be able to file a lien. Unfortunately, there may be pressure for subcontractors to sign lien waivers before they get paid.

For general contractors

A general contractor's point of risk happens after they pay the subcontractor. If they send payments through check, they must wait for the subcontractor to release the signed unconditional. Suppose the subcontractor refuses to sign this and files a lien. In that case, the general contractor must go to court to prove they paid the correct amounts. If a GC doesn't have perfect records, the courts may not rule in favor of the GC.

For any contractors

Both GCs and Subs should very carefully review any lien waiver. A legal professional can also give feedback on lien waivers. There can be huge impacts implicated with small wording choices. For example- a "conditional" lien waiver that uses past tense language is still an agreement that the general contractor paid the subcontractor.

Unconditional lien waivers supposedly protect both parties. Unfortunately, most companies use old methods of issuing, signing, and returning these forms. Accordingly, there is a constant push and pull to determine which action takes place first.

Using technology to mitigate the risks of unconditional lien waivers

Payment is only sometimes a simple transaction when a project requires multiple parties to perform different actions. GCs don't want to deal with a lien. Subcontractors need to ensure they get paid.

This process risks both parties when it's not secure or instantaneous. Companies shouldn't have to guess about payments or legality. Fortunately, with Trimble Pay, formerly Flashtract, we've recently released a feature that helps avoid these problems.

trimble-pay-blog-unconditional-waiver-laptop-1060x596

The unconditional lien waiver vault

As we mentioned earlier, collecting unconditional lien waivers is risky and frequently very slow. Unfortunately, companies exchange these documents through email. Additionally, collecting these documents in a timely manner can be difficult. An unconditional lien waiver is a terrible document to lose, so now Trimble Pay will allow for management of it directly in the app.

Rather than relying solely on emails and word of mouth to confirm payments, both parties must certify that they issued or received payment within our app. Release happens one of two ways.

  1. The GC pays their subcontractor via our official ACH feature. The official unconditional would be released immediately upon the payment clearing.

  2. Both parties put in their pin and acknowledge they sent or received the payment. The official document would only be released once the general contractor has marked the invoice as paid and the subcontractor has agreed that they received the correct amount.

So what's next?

Handling unconditional lien waivers has many risks involved for all parties. Rather than leaving time-sensitive payments up to mail or chasing down final unconditional after paying someone, you can handle everything quickly and securely through Trimble Pay.

Related articles

Article

Understanding infrastructure risk assessment

Learn how to assess high-risk assets and establish data-driven maintenance strategies....
Read full article
Article

3 ways to enhance infrastructure management with Nearmap and Trimble Cityworks

Using Nearmap in conjunction with Trimble Cityworks and Esri ArcGIS offers a highly scalable and eff...
Read full article
Article

3 improvements to the bridge inspection process

A critical part of the inspection process is taking photos of various parts of the bridge and their ...
Read full article
Attention

We tried to combine the products in your guest cart with your saved cart, but we encountered an issue while merging them. When choosing a subscription, please select either monthly or yearly as they cannot be combined. Kindly review your cart before proceeding to checkout.

Cart updated
Some items in your cart are not available for purchase in your region, so we removed them. Please review your cart before proceeding.

Items Removed:
Attention

The software you are trying to purchase is not available in your country or region.

Cart updated
The items in your cart have been updated for two reasons. Firstly, the prices now match the currency linked to your account address. Secondly, some items have been removed because they are not available for purchase in your region. Please review your cart before proceeding.

Items Removed:
Cart updated
The items in your cart have been updated for two reasons. Firstly, you've added too many of one item to your cart. Secondly, some items have been removed because they are not available for purchase in your region. Please review your cart before proceeding.

Items Removed:
Cart updated
The items in your cart have been updated for three reasons. Firstly, the prices now match the currency linked to your account address. Secondly, you've added too many of one item to your cart. Thirdly, some items have been removed because they are not available for purchase in your region. Please review your cart before proceeding

Items Removed:
Cart updated

Your currency has been changed to match the currency associated with your account address.

Cart updated

Your cart has been updated for two reasons. First, the prices now reflect the currency associated with your account address. Second, you've added too many of one item to your cart. Please review your cart before proceeding.

Cart updated

While combining the products in your guest cart with your saved cart, at least one item in your cart has exceeded the maximum allowable quantity. Please review and correct your cart before proceeding to checkout.

Attention

We were unable to access your account information. Please contact customer support for assistance.

Attention
Unable to update shopping cart information. Please refresh the page to resolve the issue. If this issue persists, please contact Trimble support.
© 2026 Trimble Inc.

Trimble is a global technology company that connects the physical and digital worlds, transforming the ways work gets done. With relentless innovation in precise positioning, modeling and data analytics, Trimble enables essential industries including construction, geospatial and transportation. Whether it's helping customers build and maintain infrastructure, design and construct buildings, optimize global supply chains or map the world, Trimble is at the forefront, driving productivity and progress.

What is an Unconditional Lien Waiver? | Trimble