How to make a transparent signature PNG
A signature with a white background covers the document's lines. Here's how to get it as a transparent PNG at the right size for Word and PDF.
Read articleHow to create a digital signature: step-by-step guide (free)
Three ways to create your digital signature — draw it, scan it or sign directly — and which to use depending on what you're signing. Nothing to install.
Read articleHow to sign a PDF on a Mac with Preview (nothing to install)
Your Mac already has everything you need to sign a PDF: Preview. Here's how to create your signature with the trackpad, the camera or your iPhone.
Read articleHow to sign a PDF in Adobe Acrobat Reader (and when it isn't enough)
Step by step to sign a PDF for free in Adobe Reader, and what to do when someone else needs to sign or the signature needs backing.
Read articleHow to sign a document someone sent you on WhatsApp
You got a PDF on WhatsApp to sign and have no printer. Here's how to sign it from the same phone and send it back in minutes.
Read articleHow to sign a Google Docs document
Two ways to put your signature in Google Docs, and the right way to get someone else to sign a document you wrote there.
Read articleHow to write a promissory note: requirements, example and mistakes that void it
The details a promissory note can't be missing, how to fill it in correctly, and what to keep in mind before signing it electronically.
Read articleSimple authorization letter: what it is, what to include and how to sign it
Everything a simple authorization letter (carta poder) needs to be accepted: parties, powers granted, witnesses and signatures. With a ready-to-use structure.
Read articleMexico's e.firma (SAT) vs. electronic signature: which one you need
Mexico's SAT e.firma and the electronic signature on a contract aren't the same thing. Here's what each is for and when you DON'T need the SAT one.
Read articleHow to write a resignation letter (with example) and deliver it signed
What a resignation letter should say, an example you can adapt, and how to deliver it signed even if you work remotely.
Read articleFirmiu vs DocuSign: pricing and feature comparison
What each document actually costs, what limits each plan carries, and when each tool is the right call. Compared against DocuSign's public pricing as of August 2026.
Read articleHow can you tell if a signed PDF was modified?
A PDF edited after signing looks identical to an untouched one. Here are the three layers Firmiu uses to make tampering detectable, and how to check it yourself in a minute.
Read articleWhat documents can you sign electronically
Electronic signatures work for far more documents than you'd think. Here are the most common ones and the exceptions.
Read articleHow to choose an electronic signature tool
Not all signing tools are for the same thing. Here are the criteria to choose the right one for your business.
Read articleFree electronic signature: how to start at no cost
Need to sign documents without spending? Here's how to use a free electronic signature and when a paid plan makes sense.
Read articleBenefits of electronic signatures for your business
Beyond saving paper, electronic signatures change how you close deals. Here are the benefits.
Read articleHow to sign a PDF from your phone
You don't need a computer or complicated apps. Here's how to sign a PDF directly from your phone.
Read articleHow to sign an employment contract electronically
Hiring remote staff is common, and signing the contract shouldn't be the bottleneck. Here's how to do it.
Read articleHow to sign a lease agreement online
Signing a lease no longer means meeting at an office. Here's how to do it online, step by step and with validity.
Read articleHow to add a signature to a PDF
Adding your signature to a PDF is easier than it seems. Here's how to do it and keep it valid.
Read articleHow to send a document for your client to sign
Sending a PDF for signature and getting it back signed can take minutes. Here's the flow and some tips to close faster.
Read articleHow to sign a construction contract online
Construction involves many parties and documents. Learn to sign contracts and records online without stopping work.
Read articleHow to sign a Word document
Have the contract in Word and need to sign it? Here's the simplest way, with validity.
Read articleHow to get paid faster by signing contracts online
The time between agreeing and signing is time without getting paid. Here's how to shorten it with online signing.
Read articleHow to keep a client from delaying their signature
An unsigned contract is a half-made sale. Here are tips to get your clients to sign on time.
Read articleWhat is an audit trail and why does it make a signature valid?
The validity of an electronic signature doesn't depend only on the stroke. Here's what an audit trail is and why it matters.
Read articleA DocuSign alternative for Latin America
Looking for a simpler, Spanish-first option to sign documents? Here's what to look for in an alternative.
Read articleHow much does electronic signature cost?
The price of signing documents online varies a lot. Here's what it depends on and how to start at no cost.
Read articleHow to reduce paperwork in your business
Paperwork costs time and money. Here are concrete steps to cut it, starting with signatures.
Read articleHow to sign a contract with a client in another country
Working with international clients shouldn't be slowed by signing. Here's how to close remotely.
Read articleTypes of electronic signature: simple, advanced and qualified
Not all electronic signatures are the same. Here are the three levels and which one you need for each document.
Read articleHow to sign an informed consent online
Clinics and practices can collect patient consent paper-free. Here's how.
Read articleHow to sign an authorization or simple power online
Authorizing someone to act on your behalf can be done online. Here's how to sign the authorization.
Read articleDoes an electronic signature replace a notary?
A common question before signing online: do I need a notary? Here's the answer.
Read articleElectronic signature vs digital signature: what's the difference?
They're used interchangeably, but they aren't the same. Here's the difference and when you need each one.
Read articleHow to sign a private loan agreement
Lending money without a signed document is a risk. Learn to sign a loan agreement online.
Read articleHow to sign a quote or estimate online
A signed quote is an approved job. Learn to get that signature online in minutes.
Read articleElectronic signature for businesses: a practical guide
Rolling out electronic signatures in your company saves time and paper. Here's where to start.
Read articleHow to sign a PDF without printing (step by step)
Forget the printer and scanner. Learn how to sign a PDF online in minutes and send it for someone else to sign.
Read articleHow to sign a service agreement online
The service agreement is what kicks off every project. Learn to sign it online and start working the same day.
Read articleHow to sign a non-disclosure agreement (NDA) online
Before sharing sensitive information, sign the NDA. Here's how to do it online in minutes.
Read articleHow to request a client's signature by email
Asking for a signature by email professionally increases your chances of closing. Here's how.
Read articleAre electronic signatures legal? What you need to know
Electronic signatures are legal across Latin America, Spain and the United States. Here's what makes them valid and where they're recognized.
Read articleHow to sign a sales contract online
Selling an item no longer means meeting to sign on paper. Here's how to sign a sales contract online with validity.
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