This is just a constraint, not a separate regulation for some stores, just like most companies need you to hand in your ID card. Because the jewelry in the gold shop is small,

The unit price is expensive and easy to lose.

Having a deposit is the most important thing.

One point is to increase the vigilance and sense of responsibility of employees.

If you want to join the company. You can consider handing it in. However, it is necessary to indicate the conditions and time of returning the deposit in the agreement or contract, and ask the other party to affix its official seal.

Because there is a lot of gold in the gold shop, it is to prevent the clerk from accidentally losing the gold.