In simple terms, the Respondent is the same person as the defendant, only the claim presented not to one person but to two or more persons who can carry, as joint and several liability, and vicarious.
At the stage of filing a claim if it is addressed to several persons, each of such persons will be the Respondent, that is, no special actions are necessary. Just make a claim and provide in all the defendants.
After the presentation of the claim and the date of adoption by the court for consideration, any action aimed at bringing the Respondent issued a petition addressed to the court, one of the participating in the trial. That is, defendants can raise and the plaintiff and the defendant.
It should be borne in mind that such procedural complicity (complicity defendants are only allowed in three cases:
- if the subject of the dispute are General duties of several defendants;

- the duties of several defendants due to one reason;

- the subject of the dispute is homogeneous of charge.
It is not excluded that all three cases can take place together.
Every Respondent in the court acts on its own behalf, but several co-defendants or each of them one can charge conducting business on its behalf any of the co-defendants. It is worth to note that after the involvement of the defendants the trial starts again. The court can itself take a decision on bringing the case of the Respondent, but such engagement will not be valid if the claimant had not given consent.
The situation, when engaging a Respondent is prevented recourse is also quite common. In principle, this helps to immediately determine who, what and how much to answer. In such a situation, the question of the plaintiff-respondents are not particularly worried, because in front of him to answer directly will be one defendant. This complicity is interested himself defendant, as in one court hearing to resolve the question of his liability to the plaintiff and the question of liability of Respondent before Respondent.