Did your buyer get a house?
Since they accepted it you should be fine. They may ask for original signatures later. They tend to be inconsistent, but reasonable. They do prefer that everything have original signatures. As Jim said, call the listing agent for advice on how to proceed from here. If you don't mind, let us know what happens and what you here from Fannie Mae and from the listing agent so we will all be clear on this for our future offers.
Robert McGuire ASR
Your Castle Real Estate
Direct - 303-669-1246
I send electronic signatures ( submit to homepath.com), but if it is accepted or they need additional forms, it is usually must be 'wet'. Same experience as you had in Sept.
But in this case I'd follow the agent suggestion( even wet signatures makes all much more complicated and time consuming..)