Vat form i - annx 03 - urd - tnvat

I was under the impression URD means who dont even have TIN number like small shops or carpenters etc. In the TNVAT Portal VAT FORM I - Annx 03 - Goods Purchased from Unregistered Dealer   - The Excel template is asking for TIN number of the seller. What to do ,  as the seller is small and he dont even have bill book or TIN number and its just voucher sign purchase . How to bring it to accounts as URD TIN number is mandatory filed in the Excel sheet.

Note : We buy old items and scraps directly from houses and how do we expect TIN number from them ? Confused .....