The mission of the Collin Central Appraisal District is to appraise all property in the Collin County Appraisal District at market value equally and uniformly. The District can acquire capital assets through a purchase, trade-in, capital lease agreement, or a contribution.For a title transfer, you'll typically need the original title, a bill of sale, and, for property transfers, a deed. Pay property taxes on time. Property Tax Statements are mailed out in October, and are due upon receipt. This publication explains the tax rules that apply when you dispose of property, including when you dispose of only a portion of certain property.