How to serve 30 Day Notice to Vacate

Question

I have a wholesale deal under contract, but the property has a tenant who hasn't ever paid any rents. My agreement with the seller is to evict the tenants before closing. I know in Texas in order to file for eviction I must have proof to show the tenant received the 30 day notice. What is the best method? I would rather not deliver it in person. So would mailing a certified letter suffice, or does the tenant actually have to sign for it? (which I think is ridiculous for a few reasons) 
Any advise will be greatly appreciated. 
Thanks in advance
Spencer

Huggy Baird · Answer

Great advice Andy.  I also email the picture to my partner so there is a timestamp of when the picture was taken in our gmail box. I started doing this per my lawyer's advice.  And I sure an thankful I did.  I once evicted a tenant who claimed we did not give the three day notice in time.  I submitted the email with picture of it taped to his door as evidence.  It saved me from having the whole eviction overturned and starting all over with a new 3 day notice.

Rob Jude · Answer

around here, the sheriff will do it for you.

Andy Collins · Answer

deliver it in person, take a picture of the clock on your car clock and the front fo the house before you do it,,if possible take an audio recording of giving it to them,,,make sure the person is 18, and its better to give it to one of the tenant on the lease (at least that what I prefer doing)

some people will never pick up the mail if something is certified