Digitally sign contracts printed on paper

sproof Fastlane - Digital signatures on standard contracts

Margit Neumann

Zuletzt geändert am: October 28, 2025

In an increasingly digitalized world, companies are faced with the question: How can contracts be concluded digitally in a legally valid and efficient manner – without excluding analogue customers? Paper-based contract processes are expensive, slow and error-prone, while complicated return channels reduce the completion rate. Digitalization often fails due to complex implementations or a lack of user-friendliness. With sproof Fastlane, however, a bridge can be built between paper-based and digital processes – and standard contract processes become simpler, faster and more efficient.

Resource and cost-intensive contracts on paper

Traditional contract processes with contracts printed on paper are slowing down many companies. Manual signatures mean printing, sending and archiving – this causes high costs, ties up resources and leads to frictional losses. Digital signatures offer an efficient alternative here, but many companies are still hesitant to make the switch.

Typical challenges are

  • High manual effort: printing, dispatch and tracking require time and personnel.
  • Exploding costs: paper, logistics and postage add up to considerable expenses.
  • Error-prone data processing: contract data from paper documents must be manually transferred to systems.
  • Slow returns: contracts get stuck in the post for days – completion rates fall.
  • Poor customer experience: Customers find the process tedious and outdated.

The result: valuable transactions are delayed or lost altogether. And although digitalization has long offered alternatives, many companies fail due to complex integrations or inflexible solutions.

Fastlane for digital signatures on standard B2C contracts

The digitalization of signature processes poses challenges for many companies. Existing solutions often require extensive system changes or complicated registration processes. This puts customers off and prevents broad acceptance. This is exactly where sproof’s Fastlane comes in, enabling a gradual transition without a complete process changeover.

Imagine you need to send thousands of contracts to customers. Instead of waiting for them to be returned by post, you can now offer the digital way – directly on the physical document. sproof Fastlane enables the seamless integration of QR codes that lead users directly to a digital signature process that is completely in the corporate design and can be flexibly designed in the UI.

Digitale Signatur

How does the Fastlane from sproof sign work?

The principle is simple:

  1. Prepare: A company prepares a contract or form in sproof sign and places a QR code on the document.
  2. Dispatch: The document is sent to the customer by the usual postal service.
  3. Sign digitally: The customer scans the QR code with their smartphone. The signature process starts immediately – without the need to register or log in.
  4. Finalize: With just a few clicks, the contract is legally signed and securely returned to the company.

Every signature process is eIDAS-compliant and is fully documented with an audit trail, which guarantees maximum legal validity.

sproof Fastlane’s hybrid approach combines paper contracts with digital signatures. Customers can continue to rely on familiar manual processes, but sign the contract electronically using a QR code – quickly, securely and with legal validity.

The advantages of Fastlane for everyone involved

The advantages of this method are clear and convincing for both sides:

For companies:

  • Maximum efficiency: Reduce the processing time of contracts from days to just a few minutes. This not only reduces processing costs, but also speeds up the entire business.
  • High completion rates: The simple, low-threshold process increases the likelihood of contracts being returned quickly and without errors.
  • Environmentally friendly: You reduce the consumption of paper, ink and the logistical emissions associated with physical shipping.
  • Modern brand image: Offer your customers a modern, seamless experience in your own corporate branding.

For end customers:

  • Simplicity: No tedious printing, signing and scanning. Everything runs smoothly via the smartphone.
  • Speed: Contracts can be signed immediately and from any location.
  • Barrier-free: The process requires neither complex registration nor special software.

Security & compliance – Made in Europe

All sproof services are developed and operated exclusively in Europe – without the involvement of third countries. The solution is fully eIDAS and GDPR compliant and meets the highest security standards. This makes sproof the European alternative to US providers for legally compliant electronic signatures.

The future is hybrid: sproof Fastlane as a top European alternative

“The future lies in the intelligent linking of established and new channels. Our mission is to bring trust and efficiency to the digital world, and the Fastlane is a perfect example of how we make this possible” says Dr. Clemens Brunner, founder and CEO of sproof GmbH.

sproof Fastlane is the answer to the question of how companies can create broad acceptance for digital processes without leaving anyone behind. It is the smart, secure and sustainable way to lead mass business into the digital future.

Further use cases: Place the Fastlane where your use cases require it

Digitale Signatur

Obtain e-signatures on site

Customers and external visitors scan a QR code on site and are guided through the Fastlane.

Fast digital signature in the workflow

Obtain e-signatures by mail

Customers and external parties scan a QR code on a document sent by post and are guided through the fastlane.

Fast digital signature in the workflow

Invite to sign by email or SMS

Customers and external parties receive a link and are guided through Fastlane.

Digitale Signatur

Embedded in your web solutions and processes

External and customer sign directly in your web environment without forwarding. The Fastlane is embedded as a widget or iFrame.

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