If it's where the lam runs up the riser, definitely no problem, if it's in the limb, you may want to fill it with ca glue depending on how deep you burn into the wood. The only problem I could foresee is having it not completely fill with glue, but if it's super shallow, I doubt that will be an issue!
The only other thing would be crushing wood fibers when burning (depending on how big the stamp is) and making a shallow area in the lam. Doubt that will be much of a problem either though haha