How to implement electronic signature tools in credit granting

Retail and the financial sector are experiencing a cycle of continuous digitalization, driven by connected customers, omnichannel journeys, and the demand for quick decisions without sacrificing security and compliance. In this scenario, electronic signature in granting credit becomes a key piece: it reduces bureaucracy, speeds up formalizations and strengthens the evidence base, with complete audit trails and modern authentication mechanisms. 

In addition to shortening deadlines, digital formalization improves the experience—customers can sign from wherever they are, on their preferred device—and enables paperless processes, with secure storage, versioning, and document governance. For performance-driven organizations, this translates into lower costs and healthier margins.

The good news: there is already plenty of technical and legal guidance on the matter. The key focus is on execution: choosing the appropriate signature type for each risk, applying facial biometrics with liveness checks, validating documents, and retaining robust evidence of consent.

Legal basis and classification: where the electronic signature relies

In Brazil, the regulatory backbone combines complementary standards: MP 2.200-2/2001 establishes the ICP-Brasil, a structure that guarantees authenticity, integrity and non-repudiation with digital certificate and cryptographic trails; Law 14.063/2020 defines the simple, advanced, and qualified levels for signatures in interactions with public authorities and also sets out guidelines for private uses; and Law 13.986/2020 regulates the electronic signature of Bank Credit Notes (CCB), requiring unequivocal identification of the signatory.

In general terms:

• simple signature: identifies the signatory and links data; suitable for low risks, with authentication reinforcements;
• advanced signature: has mechanisms that ensure authorship and integrity without necessarily using ICP-Brasil, as long as they are accepted by the parties and appropriate to the risk;
  
• qualified signature: uses ICP-Brasil certificate (high level of evidence), recommended for high-risk scenarios or specific regulatory requirements.

What are the security risks and legal invalidations and how to avoid them?

The expansion of embedded finance and the practice of retailers and fintechs issuing consumer credit have increased the volume of electronic contracts—and with them, legal disputes over authenticity and expression of intent. 

When there is no robust proof of identity or the evidence trail is fragile, decisions are made that invalidate transactions. Mitigation is based on three pillars:

• unequivocal identification of the signatory;
• integrity of the document and post-signature immutability;
• traceability and complete (technical tests of the flow).

Good compliance and anti-fraud practices

To provide legal and operational support for credit transactions, combine layers of authenticity and verification:

• facial biometrics with liveness detection: reduces the risk of impostors, deepfakes and replays;
• automated document verification: OCR, field validation and authenticity checking with cross-checks; see digital document authentication;
• risk classification: align the subscription type with the value, product and legal risk;
• document standards: PAdES, PDF/A, metadata and restrictions;
• audit trail and integrity: use digital stamp, hash and subsequent verification via ITI validator;
• LGPD and consent: record acceptance of terms, policy and purposes, as well as IP and device logs; see LGPD and digital signature;
• Information Security: policies, trails, encryption and governance; see ISO 27001 e document security.

Step-by-step implementation of credit 

Now, let's look at the steps to follow from discovery to go-live.

1. Map journeys and risks

Inventory credit products (private label card, installment plan, personal loan, BNPL, financing), subscription points, and counterparties. Define which flows require qualified signature (high risk) or advanced/simple (moderate/low risk). 

2. Establish identity policies

Risk-based KYC, document checks, Biometry e facial recognition. For high-value cases, combine biometrics and cloud certificate.

3. Standardize documents

Templates with mandatory fields, consent clauses, references to electronic media and evidence trail. 

4. Integrate the subscription platform

Connect core systems (CRM, origination, billing) via electronic signature API, configure webhooks, use templates and automations for batches (batch signature). 

5. Orchestrate authentications

Combine SMS/OTP, login, biometrics, and certification as needed. Reinforce with time stamp e subsequent validation.

6. Storage and governance

Define secure repository, retention policies, versioning and paperless. If necessary, integrate with CLM (contract lifecycle management) and GED.

7. Pilot controlled and rollout

Test products with samples, run A/B friction vs. risk tests, and adjust UX. Monitor metrics and scale gradually.

8. Training

Train store, credit, legal, and collections teams. Provide guides such as how to put signature in PDF, how to sign on your cell phone e digital signature on iPhone to reduce doubts from customers and partners.

⚠️ Also check out these related articles 👇

➡️ What is embedded finance and why is it transforming digital transactions?
➡️ How to create a digital product financial plan that follows rules and regulations
➡️ Digital signature for banks and financial institutions: how does it work?

Good technical practices for integration and compliance in electronic signature

Now, let's look at what practices you should follow, as well as the necessary documents, indicators to monitor, usability, security, and operation.

Essential technical aspects for secure implementation

• Integration architecture: Use platform SDKs/REST, token authentication, environment segregation, and webhooks to receive statuses (sent, viewed, signed). In high-volume cases, enable mass subscription and asynchronous queues.
  Formats and standards: Standardize PDFs, restrict post-signature editing, and adopt profiles Pads when appropriate.
  customer experience: Minimize steps, support mobile-first and login-free journeys when possible, with strong just-in-time authentication. Materials: customer experience e friction in digital experiences.
  Tests and logs: retain IP, user-agent, date/time, geolocation when applicable, evidence of consent and complete flow.
  Continuous scanning: periodically audit samples with signature verifier, check hash and compliance with internal policies.
  Identity and KYC: orchestra identity validation, facial biometrics e signature by facial recognition in higher risk flows; for low risk, evaluate simplified paths.
  Governance and LGPD: record purpose, legal basis, data lifecycle and means of secure disposal; see document security e LGPD and digital signature.

Typical documents and flows in credit

• Pre-approval and proposal with electronic acceptance: electronic signature on contracts e contract with digital signature.
• CCB and additives (renegotiation, extension): Contract additive.
• LGPD terms, consents and authorizations (direct debit, data sharing), with logs and storage.
• Business rules and limits integrated into the credit core and embedded finance.
• Collection with traceability of notifications and agreements; be careful with collection of unsigned contract.

Indicators, ROI and operational efficiency

• Subscription completion rate and average time per stage.
• Dispute fee and incidents of fraud.
• Cost per contract (signature + storage) vs. paper.
• Conversion by channel (store, web, app) and by product type.
• Agreements and renegotiations closed with electronic acceptance.

To measure financial impact, combine operational efficiency with incremental revenue generation: less friction in journeys reduces abandonment; faster decisions increase approval and activation.

Usability, adoption and platform switching

A common obstacle is usability — if the current platform is expensive and limited, switching to a more intuitive and flexible solution reduces rework and accelerates the learning curve.

Safety and technical standards in practice

Implement encryption at rest and in transit, data segregation by client, immutable logs, MFA for administrators, and reliable timestamping. Use PAdES profiles when necessary and preserve each version hash. 

Consider adopting encrypted digital signature e types of encryption in your architecture notebook. For high-volume flows (e.g., booklets and contract packages), activate batch digital signature. And handle exceptions: resending invitations, scaling authentication, and document revalidation.

Continuous operation and audits

Schedule quarterly audits with sample contracts, revalidate certificate chains, review policies, and update training. Use the digital signature verifier and guides like validate digital signature. For governance, align with contract management e workflow.

As you can see throughout this article, by integrating a solid legal basis (MP 2.200-2/2001, Law 14.063/2020 and Law 13.986/2020) with strong authentication, document standardization and evidence trail, the electronic signature in credit granting reduces friction, mitigates risks and sustains efficiency gains. 

And if you've read this far because you're looking to reduce costs, increase revenue, and profits, choosing an easy-to-use solution with ongoing optimizations, customized plans, and responsive support enables rapid implementation, accelerates formalization, and increases customer satisfaction. Want to see how this works in practice and evaluate a plan aligned with your volume and workflows? Meet ZapSign!