Legal analysis: The operator can use the tax-controlled invoicing software to enter the invoice issuing section and check the code of the invoice number. The operator should note that the invoice number needs to be carefully checked, and if there is an error, it will not be reimbursed; Pay attention to check the billing information provided by customers, including bank account information, billing address, taxpayer identification number and so on; Finally, choose the billing purposes, such as accommodation and catering, technical service fees and so on.

legal basis: negotiable instrument law of the people's Republic of China

article 4 when making a negotiable instrument, the drawer of the instrument shall sign and seal the instrument according to the legal conditions and bear the liability of the instrument according to the recorded items.

when exercising the rights of a negotiable instrument, the holder shall sign the instrument in accordance with legal procedures and show it.

if other debtors sign the bill, they shall bear the bill liability according to the items recorded in the bill.

the bill right mentioned in this law refers to the right of the holder to demand payment of the bill amount from the bill debtor, including the right of claim for payment and the right of recourse.

the bill liability mentioned in this law refers to the obligation of the bill debtor to pay the bill amount to the holder.

article 5 the parties to a negotiable instrument may entrust their agents to sign the negotiable instrument, and shall indicate their agency relationship on the negotiable instrument.

if the signer signs the bill in the name of the agent without the power of attorney, the signer shall bear the bill liability; Where an agent exceeds his agency authority, he shall bear the bill liability for the part that exceeds his authority.

article 6 if a person with no capacity for civil conduct or a person with limited capacity for civil conduct signs a bill, its signature is invalid, but it does not affect the validity of other signatures.

article 7 the signature on a negotiable instrument means signature, seal or both.

the signature and seal of a legal person or other entity that uses bills shall be the seal of the legal person or entity plus the signature and seal of its legal representative or its authorized agent.

the signature on the bill shall be the real name of the party concerned.