Writing a notice to owner of tax lien sale

[Tamika Rue]

I purchased a tax lien property but I believe it is vacant. Rode pass and grass is cut. I would like to write a letter to the owner to inform them that I have a lien against their property. I would also like to write a letter and tape it against the door to notify the people who are living there what's going on as well. What should I include in these letters? Should I just introduce myself and explain to them that I have a lien against their property with my contact info? Also, would painting the outside of the house count as an improvement to the property? I'm trying to jack up the price to make it harder for the owner to redeem. I'm in bham, Al. Thanks any help is appreciated!!!