How to Sign and Date a PDF Form that Doesn’t Have Signature and Date Fields
Two methods for signing and dating any PDF with Adobe Acrobat
It’s tax season again, so folks everywhere are downloading and filling out forms from the IRS and elsewhere. One common form freelancers in the US have to complete is the W-9. It’s easy enough to find and download from the IRS website as a PDF. And since the PDF sports a bunch of live form fields, you can almost fill out the entire form in seconds. Almost. The problem with the W-9, and PDF forms like it, is that there are no live fields for you to sign and date it.

The W-9 form, with the signature and date conspicuously absent from the set of highlighted form fields.
Method 1: Flatten the form fields and make new ones
Chad Chelius taught me this clever method using Adobe Acrobat to add signature and date fields to the W-9. With Acrobat’s Fill & Sign tools you
can add form fields to a document just by clicking—but only if that document doesn’t already have form fields. So, before you can add new ones you have to flatten the PDF, getting rid of the existing fields added by the IRS. To flatten the PDF, start by searching the tools for “flatten.” Then click on Preflight.
In the Preflight dialog box, click Analyze and Fix. You’ll see an alert that you need to save a copy of the PDF.
In the flattened copy, you’ll see that all the form fields were removed.

Look ma, no fields!
Then, fill the the field. Repeat as needed.
To add your signature, click Sign Yourself.
Configure the appearance of your signature and click in the PDF to add it. Note that you can resize and reposition it at any time.
To add the date, use the Add Text tool again.
Here’s the completed W-9.
If you want to make it uneditable before submitting it, with the Fill & Sign tools, click Next, then Save as a Read-only Copy.
The new copy will have (SECURED) in the title. Click Get a Shareable Link.
The copy the link and send it to whoever needs the completed form.
Method 2: Use a signature stamp to apply the date
This method is a little more hacky, but it’s actually quicker and simpler than Method 1. Use the existing fields to fill out the form. Then, when it’s time to sign and date it, choose the Fill & Sign tools.
As in Method 1, click Sign Yourself, configure your signature, and click to add it. Then click Sign Yourself again and click Add Initials.
Replace the initials in the dialog box with the date you want on the form.
Click in the PDF to add the date via your modified “initials.”
The completed W-9 form. 
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