Signature works great, still can't add a date to those IRS-supplied W-9 forms.
And it wont allow me to add an additional signature.
It allows me to use existing but wont allow me to add a new.
In Fill & Sign (in Acrobat/Reader, iOS, or web) you can have one Signature and one Initials. You could use the "Initials" spot for a second signature, otherwise you need to delete your existing signature from the drop down and then you can create a new one. There is also a checkbox when creating signatures to "Save for future use", if you uncheck this then you can create a new signature every time you need to sign.
Wow, Adobe, you really let us down on this one. WHY oh WHY would you give us the Signature functionality but not the date functionality in Acrobat Pro? I really need to open another product to accomplish this? Sure, there's a "Stamp" tool for date, but I worry the IRS will reject this as invalid. BOO. Fix it.
A digital signature always contains the exact date and time it was applied. The "Fill & Sign" tools are not really a signature at all. Just a comment with your initials or wet-signature in them. The two should not be confused.
To re-enforce what Gilad D said - signing using a tool like Fill & Sign should not be confused with "Digital Signatures".
It all depends on your needs which is the appropriate solution. If all you need to do is to "sign" something, and don't need an audit trail, or legal "proof of signature" - cases like signing a Dr form, school forms, and honestly many cases are supported by the Fill & Sign tools. However if you require proof of date signed, audit trail etc then Fill & Sign is not the right tool - Adobe Sign, or Digital Signatures in Acrobat would be more appropriate.
Digital Signatures in Acrobat DC: Certificate-based signatures, Adobe Acrobat DC
Adobe Sign (subscription based): Free trial, Adobe Sign (formerly EchoSign) | Adobe Document Cloud
Once you have created the digital id, open a pdf file and right click on the menu bar and go to Customize quick tools, next scroll down to certificates and click, here you will find the Digitally Sign, select it by clicking on it then click on the add on the right side of the window with the arrow pointing upward and a plus sign. This will add the digital signature selection on the menu bar. This is the digital id you created.