1.up to date TIN Certificate
2.Valid VAT registration certificate
3.up to date valid trade license
4. Authorization letter of Authorized person
5.similar working experience certificate
And as per TDS
APPSND2.D-2 Supply of Summer cloth, Winter cloth, Shoes ,Jacket, Umbrella etc for tecnical and non-tecnical workers under S&D Division-2,BPDB,Brahmanbaria