If the buyer is not working with a real estate agent and does not have representation, the offer would come directly from the buyer. Represented buyers can also write their own offer letter and have their agent submit it for them.
A request for the highest and best offer can occur in real estate when a seller receives multiple offers during the sale of their home. The seller might request interested buyers to submit their highest offer with their best terms, allowing them to choose whichever one they like best without engaging in negotiations.
Many REALTORS® contact the National Association looking for real estate forms. Forms are state specific because real estate laws vary significantly from state to state. Therefore, forms are usually provided by your state and/or local association of REALTORS®.
Writing your own contracts is perfectly possible, and legal. But it's also an incredibly bad idea. There's two reasons for this: Property law is complicated. Because it's such a fundamental part of legislation, it's often lots and lots of different laws layered on top of each other.
A letter can be in violation of fair housing laws. Seller's agents who accept them are opening themselves and the sellers up to lawsuits. If you are prejudiced toward one type of buyer or another, fine - just don't let it get put into writing.
Yes you can. In fact your realtor would like appreciate your proactive approach. If you see a house you like, then you can ask your realtor to write up an offer on it.
Represented buyers can also write their own offer letter and have their agent submit it for them.