Rule 1.15. Safekeeping Property
(a) A lawyer shall hold property of clients or third persons that is in a lawyer's possession in connection with a representation separate from the lawyer's own property, in accordance with the provisions of the New Hampshire Supreme Court Rules.
The lawyer shall maintain the minimum financial records with respect to the client and third party funds as may be required by the New Hampshire Supreme Court Rules and shall comply with every other aspect of those Rules. Sufficient records of all other property of clients or third persons shall be kept by the lawyer and shall be preserved for a period of six years after final distribution of such other property or any portion thereof. All client and third party property shall be identified as such and appropriately safeguarded.
(b) A lawyer may deposit the lawyer's own funds in a client trust account for the sole purpose of paying bank service charges on that account, but only in an amount appropriate for that purpose.
(c) A lawyer shall deposit into a client trust account legal fees and expenses that have been paid in advance, to be withdrawn by the lawyer only as fees are earned or expenses incurred.
(d) Funds may be disbursed from lawyer trust accounts upon (A) (i) deposit, receipt of which is acknowledged by the receiving financial institution, of cash, bank cashier's check, certified check, or electronic transfer of funds at least equal to the sum of such disbursements, or (ii) clearance of any other form of deposit by such receiving financial institution, and (B) availability of such funds to the lawyer from the receiving financial institution.
(e) Upon receiving funds or other property in which a client or third person has an interest, a lawyer shall promptly notify the client or third person. Except as stated in this rule or otherwise permitted by law or by agreement with the client, a lawyer shall promptly deliver to the client or third person any funds or other property that the client or third person is entitled to receive and upon request by the client or third person, shall promptly render a full accounting regarding such property.
(f) When in the course of representation a lawyer is in possession of property in which two or more persons (one of whom may be the lawyer) claim interests, the property shall be kept separate by the lawyer until the dispute is resolved. The lawyer shall promptly distribute all portions of the property as to which the interests are not in dispute.
New Hampshire Supreme Court Rule 50(2)B provides that: all cash property of clients received by attorneys shall be deposited in one or more clearly designated trust accounts (separate from the attorney's own funds) in financial institutions. Any attorney depositing client funds into an out-of-state financial institution shall file a written authorization with the Clerk of the Supreme Court authorizing the Court or its agents to examine and copy such out-of-state account records. Under no circumstances may an attorney use out-of-state banks other than those located in Maine, Vermont or Massachusetts.
Paragraphs (a) and (b), which differ from ABA Model Rule 1.15(a), were drafted with the provisions of Rule 50 in mind, especially, 50(2)B. Paragraphs (c), (d), (f), and (g) follow the language of ABA Model Rule 1.15 (b), (c), (d) and (e).
With respect to the broader question regarding retention of client files generally, see Practical Ethics: Ethical Considerations and the Retention of Client Files (http://nhbar.org/pdfs/PEA3-99.pdf, 1999). That article discusses an amendment to the New Hampshire Rules of Professional Conduct, proposed in 1997 but never formally approved, providing that client files be retained for at least six years or beyond any applicable period of statute of limitations on actions, whichever is longer. The article concludes that "an attorney's analysis of whether, when, and how to discard a client or former client's file materials must begin and end with the attorney's continuing obligation to avoid prejudicing the client's interest, Rule 1.16(d)." The article also incorporates the Guidelines For Client File Retention/Disposition found in ABA Informal Opinion 1384.
While ABA Model Rule 1.15 describes the circumstances under which funds must be deposited in a lawyer's trust account, it does not specify when funds may be disbursed. This issue arises most frequently when the deposited funds are received via check or other negotiable instrument. Because funds are frequently received in this manner and oftentimes must be immediately disbursed to third parties as an integral part of transactions that lawyers are engaged in on behalf of their clients, needed guidance in this area is provided in paragraph (e). See generally RSA 382-A:3-411 which supports this treatment of bank cashier's and certified checks.
Rule 1.15 (d) provides that funds may only be withdrawn from a trust account when fees are "earned" or expenses are "incurred." This new rule, while implicitly recognizing that so-called flat fees and minimum fees are both permissible, raises questions about when such fees have been "earned" for purposes of transfer from a trust account to an attorney's business or operating account (or perhaps directly into a personal account). Rule 1.5's requirement that any fee must be reasonable is the overarching principle governing all fee issues.  Because this requirement may necessitate the return of some portion of a flat or minimum fee when the lawyer cannot complete representation because of conflict or other early termination of the attorney/client relationship, such fees should be considered "earned" only when work of comparable value has been performed. Fees that may be required to be returned under Rule 1.5 must be retained in the lawyer's trust account. Lawyers should deposit all flat fees or minimum fees into their trust accounts to be periodically withdrawn only upon a determination that the value of services provided is in reasonable proportion to the percentage of the total fee withdrawn. Good practice suggests that the lawyer and client enter into a written agreement in advance of payment of the fee setting reasonable mileposts for withdrawal. For example, in a criminal case the lawyer might withdraw a certain amount upon initial assessment of the case, further funds for pre-trial practice, and the remainder upon completion of the trial or a negotiated plea.
The question of non-refundable, earned upon receipt retainers was addressed in Doherty's Case, 142 N.H. 446 (1997) in the context of bankruptcy court proceedings. In that case, the bankruptcy court had found that in a bankruptcy proceeding there was no such thing as a non-refundable, earned upon receipt retainer and a lawyer's failure to segregate a client's retainer into a separate client trust account violated Rule 1.15(a)(1). The attorney admitted to this violation and the Supreme Court affirmed the referee's ruling that the attorney had violated Rule 1.15(a)-(c).
 A lawyer should hold property of others with the care required of a professional fiduciary. Securities should be kept in a safe deposit box, except when some other form of safekeeping is warranted by special circumstances. All property that is the property of clients or third persons, including prospective clients, must be kept separate from the lawyer's business and personal property and, if monies, in one or more trust accounts. Separate trust accounts may be warranted when administering estate monies or acting in similar fiduciary capacities. A lawyer should maintain on a current basis books and records in accordance with generally accepted accounting practice and comply with any recordkeeping rules established by law or court order. See, e.g., ABA Model Financial Recordkeeping Rule.
 While normally it is impermissible to commingle the lawyer's own funds with client funds, paragraph (b) provides that it is permissible when necessary to pay bank service charges on that account. Accurate records must be kept regarding which part of the funds are the lawyer's.
 Lawyers often receive funds from which the lawyer's fee will be paid. The lawyer is not required to remit to the client funds that the lawyer reasonably believes represent fees owed. However, a lawyer may not hold funds to coerce a client into accepting the lawyer's contention. The disputed portion of the funds must be kept in a trust account and the lawyer should suggest means for prompt resolution of the dispute, such as arbitration. The undisputed portion of the funds shall be promptly distributed.
 Paragraph (e) also recognizes that third parties may have lawful claims against specific funds or other property in a lawyer's custody, such as a client's creditor who has a lien on funds recovered in a personal injury action. A lawyer may have a duty under applicable law to protect such third-party claims against wrongful interference by the client. In such cases, when the third-party claim is not frivolous under applicable law, the lawyer must refuse to surrender the property to the client until the claims are resolved. A lawyer should not unilaterally assume to arbitrate a dispute between the client and the third party, but, when there are substantial grounds for dispute as to the person entitled to the funds, the lawyer may file an action to have a court resolve the dispute.
 The obligations of a lawyer under this Rule are independent of those arising from activity other than rendering legal services. For example, a lawyer who serves only as an escrow agent is governed by the applicable law relating to fiduciaries even though the lawyer does not render legal services in the transaction and is not governed by this Rule.
 A lawyers' fund for client protection provides a means through the collective efforts of the bar to reimburse persons who have lost money or property as a result of dishonest conduct of a lawyer. Where such a fund has been established, a lawyer must participate where it is mandatory, and, even when it is voluntary, the lawyer should participate.