A retainer agreement is a long-term work-for-hire contract between a company and a client that retains ongoing services from you (as a consulting business) and provides you with a stable amount of payments.
To summarize what is a retainer agreement, it can be structured in several different ways: Client pays a set amount each month to access a certain amount of time. Client pays a set amount each month for a specific set of deliverables. Client pays simply to have access to the freelancer.
Once a contract or retainer agreement has been signed between both parties, there's no question that privilege applies. Nonetheless, it generally starts before a contract is officially signed, even if you ultimately do not hire the attorney you had a consultation with.
Traditional (Hawley) retainers have a piece of wire attached to plastic (or acrylic). Clear retainers (Essix) are also plastic but don't have any wires. Both are custom-made to fit your teeth.
It provides: “Use the singular possessive case 'attorney's fees' (not 'attorneys'') in the term 'attorney's fees,' even though in the particular case more than one attorney may be involved.” OFF. OF THE REP. OF DECISIONS, THE SUPREME COURT'S STYLE GUIDE § 10.3 (Jack Metzler ed., 2016).