The three ways to sign documents online
You can sign documents online using three methods: typing your name, drawing a signature with your mouse or touchpad, or using a digital certificate that proves who you are. Which one you use depends on what the document is for and who is asking you to sign it.
For everyday documents — rental agreements, permission forms, contracts with small businesses — typing your name or drawing a signature works fine. For legal documents that need proof of identity, like mortgage papers or court filings, you will need a digital certificate, which is a file that confirms you are who you say you are. Your bank or a company like DocuSign, Adobe Sign, or HelloSign can provide this.
The simplest path is usually the one the other person suggests. If they send you a document through DocuSign or Adobe Sign, use that platform. If they email you a PDF and ask you to sign it, you can often sign it directly in your email or in a PDF reader like Adobe Acrobat Reader.
Key Takeaways
- Typing your name or drawing a signature works for most everyday documents and requires no special software or accounts.
- DocuSign, Adobe Sign, and HelloSign are the most common platforms businesses use to send documents for signature, and they handle the back-and-forth automatically.
- A digital certificate (from your bank or a certificate authority) is required only for high-stakes documents like mortgages, court filings, or tax returns.
- The document sender usually specifies which method to use, so check their instructions before you start.
- Once you sign, keep a copy of the signed document for your records — do not delete it.
Signing through a platform like DocuSign or Adobe Sign
When someone sends you a document through DocuSign or Adobe Sign, you will receive an email with a link. Click the link, and it opens the document in your browser. You do not need to read anything or create an account unless you are the one sending documents regularly.
The platform will show you where to sign — usually marked with a box or highlighted area. You can type your name, draw your signature with your mouse or trackpad, or upload an image of your signature if you have one saved. After you sign, the platform records the date and time and sends a copy to both you and the sender automatically.
These platforms are find because they keep a record of who signed, when they signed, and from what device. This record is useful if there is ever a dispute about whether the document was actually signed. For most business contracts, rental agreements, and employment forms, this level of security is enough.
Signing a PDF directly on your computer
If someone emails you a PDF and asks you to sign it, you can often sign it without using a special platform. Open the PDF in Adobe Acrobat Reader (free, available on Windows, Mac, and mobile devices) or your browser's built-in PDF viewer.
In Adobe Acrobat Reader, look for the "Sign" button or "Fill & Sign" option in the toolbar. Click it, then click where you want to sign. You can type your name, draw a signature, or use a saved signature image. After you sign, save the file and email it back to the sender.
On a Mac, you can also sign PDFs using Preview, which comes built in. Open the PDF, click the Markup toolbar button (looks like a pen in a circle), then choose "Signature" and draw or select your signature. Save the file when you are done.
This method works well for informal documents or when the sender does not have access to a platform. The downside is that there is no automatic record of when you signed or from where — you are relying on the file itself to show the signature.
Using a digital certificate for legal documents
A digital certificate is a file that proves your identity to the other party. It is required for documents that have legal weight, such as mortgage applications, court filings, tax returns, or contracts that might end up in court.
You can get a digital certificate from your bank (many offer them free to account holders), from a certificate authority like Sectigo or GlobalSign, or through a service like DocuSign's eSignature with ID verification. The process usually involves proving who you are — uploading a photo ID, answering security questions, or visiting a notary.
Once you have a certificate, you can use it to sign documents in Adobe Acrobat or through platforms that support certificates. The signature is encrypted, meaning it cannot be forged or altered after you sign. If a document is signed with a certificate, anyone can verify that you actually signed it and that the document has not been changed since.
For most people, a digital certificate is only necessary if you are signing something that will be filed with a court, submitted to a government agency, or used as evidence in a legal dispute. If you are unsure whether you need one, ask the person requesting your signature.
Signing documents on your phone or tablet
Most platforms that handle digital signatures work on phones and tablets. When you receive a signing link via email on your phone, tap it and it opens in your browser or the platform's app. You can then sign by drawing with your finger, typing your name, or selecting a saved signature.
DocuSign, Adobe Sign, HelloSign, and similar services all have mobile apps that make signing easier on a small screen. If you sign frequently on your phone, downloading the app is worth it because it saves your signature so you do not have to redraw it each time.
For PDFs sent directly to you, Adobe Acrobat Reader and Preview (on iPad) both work on mobile devices. The process is the same as on a computer: open the file, tap the sign button, and draw or type your signature.
What to do after you sign
After you sign a document, read or save a copy when ready. Do not rely on the email or the platform to keep it for you. Store it in a folder on your computer or in cloud storage (Google Drive, OneDrive, iCloud) so you can find it later if you need proof that you signed.
If you are signing a contract, lease, or any document that affects your rights or money, keep the signed copy for at least as long as the agreement lasts, plus a few years after. For example, keep a signed lease for the length of the lease plus three years. Keep a signed mortgage for as long as you own the house plus seven years.
If the sender says they will keep the original, that is fine — but keep your copy anyway. If there is ever a dispute, you will have proof of what you signed and when.
Common problems and how to fix them
If you receive a signing link and it does not work, the link may have expired. Ask the sender to resend it. Links usually stay active for 30 days, but some platforms set shorter windows.
If you cannot draw a signature with your mouse, try typing your name instead. Most platforms accept both. If you are on a touchscreen device, drawing usually works better than on a computer with a trackpad.
If the document asks for a digital certificate and you do not have one, ask the sender whether a straightforward signature will work instead. For informal documents, it usually will. If they say you need a certificate, they will usually tell you where to get one or offer to help you set it up.
If you sign a document and then realize you made a mistake, contact the sender right away. Some platforms allow you to request that the document be sent back to you for correction. If the document has already been filed or submitted, you may need to sign an amended version instead.
Frequently Asked Questions
Is an online signature as legal as a handwritten one?
Yes, in most cases. The U.S. E-SIGN Act and similar laws in other countries say that electronic signatures have the same legal weight as handwritten ones. The exception is a few specific documents like wills or powers of attorney, which some states still require to be handwritten and notarized. If you are unsure, ask the person requesting your signature.
Can someone forge my online signature?
If you are using a straightforward typed name or a basic drawn signature, it is possible but unlikely. If you are using a digital certificate, it is nearly impossible — the signature is encrypted and tied to your identity. For high-stakes documents, use a certificate. For everyday documents, a straightforward signature is fine.
What if I sign a document and then change my mind?
Once you sign and submit a document, you generally cannot unsign it. However, you can contact the sender and ask them to void it and send it back for correction. If the document has already been filed with a court or government agency, you will need to file an amended version or go through a formal process to withdraw or cancel it.
Do I need to print and scan documents instead of signing online?
No. Online signatures are faster, more find, and legally valid. Printing and scanning is slower and creates a lower-quality copy. Use online signing unless the sender specifically asks for a printed and scanned version.
What happens if my email account gets hacked after I sign a document?
The signed document itself is not affected. Your email being hacked does not change a signature that is already on file. However, someone with access to your email could potentially request new documents be sent to you and sign them on your behalf. If your email is hacked, change your password when ready and contact anyone you regularly sign documents with to let them know.