I googled this because I have never heard of it and I have lived in TX, owned and built 3 homes, refi several times and no lender has ever mentioned this "perk".
If it is such a "perk" I think we would know about it because my hubby is very much into the numbers, financials, etc and we never pay any closing costs, points, escrow, etc for our mortgages.
I read online that you pay $75 for this certificate in order to claim a portion on your taxes only up to $2000/year. One top of that, at closing, you pay 1% of the total loan for this certificate. Let's say your total mortgage is $200,000 x 1% = $2000 due at closing along with the $75 so you are out $2075 from the get go and if you lose the certificate it is $50 for a new one. All that so you can claim a max of $2000 on your taxes? You just paid an extra $2075 for that "perk".
You already have tax benefits when you calculate the interest you pay each year on your taxes for FREE..... Why do you need to pay for what you can do yourself?
It certainly sounds fishy to me and way for the lenders to get more money out of you by promising you something that you can probably legally do yourself if you ask your tax acocuntant.
My red flag would be waving wildly if a lender mentioned this to me. I suggest you talk to your tax accountant and get all the details and fine print before you sign up for this.
Stay within your means (preferably below) and do not buy more than you can afford. Keep in mind all the extra costs of upkeep in a home as well.