All the postal receipts will prove that someone received your letter. But how would you prove what you wrote in those letters. you could ask some of your friend in Texas to hand deliver the letter and ask them to sign the receipt of letter.
Dean Gupta, CRS,SFR,MBA,BROKER
Serving home Buyers/Sellers one at a Time for Full Satisfaction since 1991.
Just remember one # to Call Any time: 763-537-8382
(90% of Time you will get me on Phone on your First Attempt)