buying a 1500 sq ft, commercial real estate

[Mushtaq G.]

hi Friends, 

I started investing in residential SFH about two years ago and hold a couple of rental properties, familiar with how the residential process works, recently I came across an opportunity to purchase a small 1500 sq.ft commercial/retail unit in a new development in North Texas (near Frisco/ 121), I am dealing directly with the developer and he asked me for a 5K token deposit to confirm my intent, followed by contract etc..etc..,

I trust the developer and hence no issues with the risk but I still wanted to take some precautions to protect my deposit, is there a TREC document or letter of intent I can use to protect my deposit, appreciate your guidance