1. Forged signature

Forged signature means that criminals forge the signer's signature on bills and defraud money by forging real tickets. Forging a signature usually requires a certain skill and craft, which can be achieved by imitating the handwriting of the signature and using special tools. Once the signature is forged, the authenticity of the bill is questioned and it is easy to cause financial losses.

2. tampering with the amount

Tampering with the amount means that criminals deliberately modify the amount on the bill to make it look bigger or smaller in order to obtain improper benefits. For example, change "1000" to "10000" or change "1000" to "100". The purpose of tampering with the amount is usually to defraud more money, or to cover up criminal acts.

3. Fictitious bills

Fictitious bills refer to making completely false bills, including fabricating false transactions and forging bill styles to deceive others. Fictitious bills are often accompanied by fictitious trading background and company information to make them look more real. Criminals can defraud loans, gain credit and evade taxes through fictitious bills.

4. Multiple transfers

Criminals can sell or transfer bills many times, each time in the form of original bills. In this way, they can get money from different people many times, thus making illegal profits. This behavior is usually accompanied by multiple forged signatures and fictitious transaction information.

Forge a seal

In some bill transactions, legal persons or companies usually need to stamp for confirmation to prove the authenticity of bills. Criminals can forge relevant company seals or company seals to make fake bills look more authentic.