《明史·列传·卷二百一十》
礼部建议让他们在日后把旧勘合的金牌悉数上缴后，才给他们发新勘合的金牌，皇帝也同意了。
部议令异时悉缴旧，乃许易新，亦报可。
The Ministry of Rites suggested that they should only be issued new license gold plates after they had handed in all the old license gold plates, and the emperor agreed.