You should have a clearly written agreement that outlines the number of appointments, the duration of each appointment, who is providing the service (this is important as you have the right to choose who delivers your service. You also have the right to interview a provider. Even your house cleaner or gardener should be choice driven. 

Don't make the mistake of being told you have to have this person or that person because that is the only person who your support coordinator can access. If that is the case then maybe you should look for a different agency provider or support coordinator).   

Your service agreement should document the number of sessions but also if you are seeking an assessment such as a psychological needs/ behavioural  technician report or OT report then your service agreement should outline how many sessions are required for the assessment and how many sessions are required to write the report and give a total cost for the service. 

If your service agreement is for ongoing mental health counselling , physiotherapy or OT / life-skills development then  it should say something like: Ongoing psychological counselling fortnightly at a cost of $ *** total number of sessions** total cost*** including NDIS review report .  It should also tell you clearly if the service is to be provided by a qualified therapist or a therapy assistant.

Something else to watch out for is that you do not get talked into handing over all your funding to one provider resulting in you not being able to access any other services that you or your child might need.  You may need multiple supports from multiple providers  that must  come from the same funding stream, but unless you are aware of this, you may be left short of services.

When it comes to payment of services, most people have a plan manager. Most plan managers send out a monthly summary of what has been used and what has or is to be paid. Some plan managers use apps such as Careview Advantage which gives the participant full access of their package, whats available, what invoices are waiting to be paid and it even gives the ability to click approval or deny approval if a service hasn't been provided but was invoiced for. 

And then there are other support coordinators & plan managers out there that don't place the participant in the drivers seat. I have spoke with participants who had no idea that they could decide who they have as providers. I've even spoke to people who have told me that they are told they have doctors appointments or assessments they have to go to because the support coordinator decided they needed this. This has nothing to do with rights, choice or the NDIS or Disability ACTs. This is control and discrimination and a clear  breach of the ACTS.