I don't know for a fact that the search engines care about this, but the major problem related to scams I see often involves a web-builder or theme author simply swapping out an HTML4 document header for an HTML5 header, which takes 2 seconds, while leaving the rest of the document as HTML4. 

My car has full exhaust/headers its pretty loud and tuned over 500hp now.

So they 'gotcha.The form header looks like this.

I had to come up with a good header to ketch peoples eye so I could get an answer. lol but im willing to put the money and time in.

I used a Firefox plugin "Live HTTP Headers" to see what data was being passed to the server.

You can open a CSV with notepad.exe, perform global edits on the column header names and then save for subsequent import.

I've seen local condos that have gas heat, but the gas bill is included in monthly fees. im sure there are many apartments that have gas and electric separately meters.if you are competing against apartments that have utilities extra, and your add that info to your listing header.

The house was built in 1926 and was framed with 2x4s only, so we had to reframe all the roof joists and ceiling joists because they were all sagging, we reframed every interior wall and put new headers in for all of the windows.

In my experience (former web designer, current owner of e-commerce site), these are what have brought home the bacon.Extended Domain (what follows the .com)Header tagsTitle TagsAlt tagsContent (not necessary to go crazy with keyword density)Domainand links to a certain degree all affect your SE placement.

Do timestamps/headers of the e-mail hold up in court as a proof that a notice has been delivered?