If it is gold jewelry, it doesn't matter whether there is an invoice or not. Generally, recycled jewelry will be tested. If the content meets the requirements, it will not affect. If it is other fin and jade jewelry, it will be much better to have an invoice, but even if there is no invoice, the buyer will make the corresponding appraisal.

As long as it is your own thing, it is genuine, and no matter whether there is an invoice or not, someone will buy it. If the other party needs an invoice, it can also go to the tax bureau to issue it, or find a jewelry store to pay the tax, which will generally help.