Abstract: Method and apparatus for roll forming and marking sheet metal. Sheet metal is embossed with an identifying relief pattern as the sheet metal moves through the nip between first and second forming rollers of a roll-forming machine. More particularly, sheet metal is embossed with first and second embossing rollers juxtaposed so that there is a nip therebetween. Sheet metal moves through the nip between the first and second embossing rollers as the sheet metal moves through the nip between first and second forming rollers. Sheet metal products are easily and economically marked with permanent identifying relief patterns.