1, the actor has corresponding capacity for civil conduct;
2. The intention of the actor is true;
3. Check whether the contents of the certificate comply with laws, regulations, public order and good customs;
4. Ensure that the form of the certificate meets the legal requirements;
5. Other legal and effective conditions.
The basic contents of lawyer's testimony include:
1. When two or more parties commit specific legal acts, the designated witness lawyer must be present to witness and supervise the legal acts of the parties;
Examining whether the materials provided by the parties are authentic and the contents of relevant documents are legal;
3. Review the qualifications of the parties and their agents. If it is a legal person, it shall be ascertained whether it has the qualification of a legal person. Where an agent entrusts to sign a contract, it shall find out whether there is the identity certificate of the legal representative or representative and the power of attorney of the legal representative (or representative).
To sum up, it is effective to prove that it meets the conditions: the actor has corresponding civil capacity; The actor's will is real; Check whether the contents of the certificate comply with laws, regulations, public order and good customs; Ensure that the form of the certificate meets the legal requirements; Other conditions for the entry into force of laws, etc.
Legal basis:
Article 143 of the Civil Code of People's Republic of China (PRC)
A civil juristic act that meets the following conditions is valid:
(1) The actor has corresponding capacity for civil conduct;
(2) the meaning is true;
(three) does not violate the mandatory provisions of laws and administrative regulations, and does not violate public order and good customs.
Article 469
The parties may conclude a contract in writing, orally or in other forms.
Written form refers to contracts, letters, telegrams, telexes, faxes and other forms that can tangibly express the contents contained.
A data message that can tangibly express its content through electronic data interchange, e-mail, etc. , and can be retrieved at any time, are considered in writing.