He bears a testimonial as to his character.

他带着一张他的品行证明书。

《新英汉大辞典》

Always get at least a testimonial when they say how happy they are.

当有人说他多高兴时别忘了至少要封感谢信。

youdao

Ask if he or she can provide you some great references. You may also ask for a testimonial letter.

询问他或她能否给些好情况的参考，你也可以要求查看感谢信什么的。

youdao

But to interpret this as a testimonial to the accuracy of the ratings is specious.

ECONOMIST: Rating agencies

Newcastle Falcons will take on Super 14 side Western Force in a testimonial for Burke at Kingston Park on Friday.

BBC: Falcons close to my heart - Burke

The fixture will also double as a testimonial match for veteran open-side flanker Martyn Williams and raise money for selected charities.

BBC: Cardiff Blues face Newport Gwent Dragons in pre-season