Acceptance of service – for example, when using a lawyer, they can accept in their office (i.e. to be validly served with) documents served by courts and authorities, on behalf of the client – this is acceptance of service.

Note that lawyers do not practice law for free; their personal advocacy is paid, so when asking a lawyer for their acceptance of service on a concrete legal issue, or to represent you in court hall, you should pay them for their opinion and legal advice/representation; it is the same like when you visit a doctor and pay for their competent diagnose and accurate medical treatment.