<human>: Can you summarize the given text in a few sentences?

(I live in Colorado.)

Hello!  As the title says, I updated my signature last year, meaning that I just started signing everything with a new signature without doing anything official about it... at least until I submitted a mail in voting ballot in November.  I received a response from the voter registration office (or some such place) that said that my vote would not be counted unless I sent in a copy of my identification for my updated signature, which I did.

However, a few months later, I received another letter that said that my vote did not count because I did not respond to the first letter (even though I did).  I responded again but never heard anything else.

Later today, I am bringing my motorcycle to someone who lives about an hour away to sell it to him (we previously met in person and discussed price, etc.).  My question is this: how can I spare this guy the potential headache of taking my signed title and bill of sale to his DMV and getting rejected if my signature is different on file?

Also of note, my driver license still has my old signature on it, and I have used that signature several times for registration purposes in the county that I live and vote in (Boulder County) but have never lived in the county of the guy I am selling to (Adams County).  I greatly appreciate any help!
<bot>: I starting signing things with a different signature last year, need to sell a motorcycle today, and want to spare the buyer any headaches at the DMV when he registers.