Subject to the terms of this retainer agreement, in the event any bill from this firm remains unpaid beyond a 30-day period or, if in the judgment of this firm. With a deferral, you will not have to pay any fees and costs at the beginning of your case, but you will be expected to pay at some time in the future.This client Retainer Agreement is for ongoing service agreements between a client and consultant or contractor. This agreement for legal representation is between, AGENCY NAME, and CLIENT(S) NAME(S). Online legal forms are useful for frequent, basic, and necessary tasks. Sample Retainer Agreement. In completing the Financial Questionnaire, list only income and assets that you have access to.