Final answer:
Fee sharing between attorneys in different firms is allowed when ethical requirements such as proportion, client's informed consent, reasonable total fee, and no conflict of interest are met, aligning with legal precedents like Glasser v. United States.
Step-by-step explanation:
In most jurisdictions, fee sharing between attorneys, even from different firms, is permitted as long as certain ethical rules are observed. These rules generally mandate that the fee sharing arrangement is proportionate to the work conducted by each attorney and that the client is informed of and agrees to the terms of the fee sharing arrangement in writing. Additionally, the total fee must be reasonable and not increase the cost to the client because of the shared arrangement. This practice ensures that the right to an attorney is upheld and that there are no conflicts of interest, aligning with the legal precedent set by Glasser v. United States, which safeguards the Assistance of Counsel Clause of the Sixth Amendment.