Published 2026-09-22 · LuckyMDM Blog
Device subscription agreements are almost always drafted on a pre-printed form by one party, and the interpretive consequences of that fact are not optional. Under the common law rule of contra proferentem, an ambiguous term is construed against the party who drafted it; under UCC Article 2A-109(1), even a clause that says you may act "at will" or "when you deem yourself insecure" is read as permitting action only where you in good faith believe the prospect of payment or performance is impaired. Only three things are computable in a contract: amount, time and state. Every clause that says "as actually incurred," "commercially reasonable efforts" or "necessary measures" hands the interpretation to the other side.
Contra proferentem is the common law principle that ambiguity in a written instrument is resolved against the party who drafted it. In United States legal materials it appears in the Restatement (Second) of Contracts section 206, and in the Uniform Commercial Code it is embedded in several places rather than stated once. The rationale is straightforward: the party who chose the words had the opportunity to make them clear, so that party bears the cost of not having done so.
For a device subscription business this is not a technicality. The entire agreement, including any storefront notice and any incorporated schedule, is drafted by the provider. There is no negotiation and no markup, which means the rule applies to essentially every provision.
Article 2A-109(1) is the single most useful provision for this topic, because it addresses the exact drafting habit that causes trouble. It provides that a term giving one party the power to accelerate payment or performance, or to require collateral or additional collateral, "at will" or "when he deems himself insecure" or in words of similar import, shall be construed to mean that he has power to do so only if he in good faith believes that the prospect of payment or performance is impaired.
Two consequences follow. First, drafting a clause in absolute terms does not make it absolute; the statute reads a good faith limitation into it regardless. Second, because the limitation is subjective and factual, the provider ends up having to prove its own state of mind, which requires a record. A clause that looked like maximum discretion becomes an evidentiary obligation.
Article 2A-108 adds a separate layer: if a lease contract or any clause in it is found to have been unconscionable at the time it was made, a court may refuse to enforce the contract, may enforce the remainder without the unconscionable clause, or may limit the application of any unconscionable clause to avoid an unconscionable result. Unconscionability and contra proferentem are distinct doctrines; prominence and disclosure do not cure the former, and they only mitigate the latter by removing the ambiguity.
Note that Article 2A is a state enactment and states have not adopted it uniformly or in the same version. Section numbers and wording should be checked against the local enactment before relying on any of them.
Article 2A-103(1)(e) defines a consumer lease partly by reference to a total contractual obligation threshold, commonly USD 25,000, though some states have adjusted it. Where a lease is a consumer lease, additional obligations attach, including the disclosure regime in Regulation M, 12 CFR Part 1013, which requires specific items to be disclosed in a clear and conspicuous manner before consummation. For contracts that are financed or assigned, the FTC Holder Rule at 16 CFR Part 433 requires a prescribed notice preserving the consumer's claims and defences against a holder, and its absence can have consequences for the assignee whether or not the drafter intended them.
The same idea is codified rather than imported from case law. Council Directive 93/13/EEC on unfair terms in consumer contracts provides in Article 5 that terms must be drafted in plain, intelligible language and that, where doubt remains about the meaning of a term, the interpretation most favourable to the consumer prevails. In the United Kingdom, the Consumer Rights Act 2015 Part 2 carries this forward: section 62 sets the fairness test as a term that, contrary to the requirement of good faith, causes a significant imbalance in the parties' rights and obligations to the detriment of the consumer; section 64 requires that a written term be transparent, meaning in plain and intelligible language and, if in writing, legible and presented clearly.
There is one provision worth quoting in full to a drafting team, because it converts transparency from a courtesy into a legal stake. Section 69 provides that the fairness assessment does not apply to a term that specifies the main subject matter of the contract or that sets the price, but only to the extent that it is transparent and prominent. If the price term is buried, unclear or ambiguous, the exemption is lost and the price itself becomes assessable for fairness. Under United States law the equivalent pressure arrives through a different door, namely the disclosure regimes already mentioned, but the practical instruction is the same: make the money terms legible and computable or lose control of them.
Phrases such as "fees as actually incurred," "a commercially reasonable late charge" and "reimbursement at fair market value" share one defect: at signature neither party can produce a number. Once no number exists, the clause has to be interpreted, and interpretation runs against the drafter.
A computable amount clause names a base, a rate and a cap. A late charge, for example, has a base of the unpaid amount, a rate expressed per day or per month, and a cap stated either as a percentage of the unpaid amount or as a fixed ceiling.
"Upon default the provider may take such action as it deems necessary," "the term renews automatically," "release will occur promptly after payoff" — all of these lack a countable start point or a countable number of days.
A computable time clause names a trigger date, a number of days and an action. A collections ladder, for example, states that the trigger date is the day after the scheduled payment date, that a cure period of 7 days runs from that date, and that after two SMS messages and one call with no payment certain functions are suspended, with a full device lock after 15 days and notice 24 hours before any lock.
"Condition as determined by the provider" and "the subscriber is responsible for normal wear" share a different defect: the test cannot be reproduced by a third party.
A computable state clause names a measurable metric, a measurement method and a measurement time. Battery maximum capacity is a metric; reading it in settings and screenshotting it is a method; within 24 hours of receipt is a time. The grading rubric must be an incorporated schedule, because a rubric that is not part of the agreement is not a standard at all.
| Vague draft | How it reads in a dispute | Computable rewrite |
|---|---|---|
| Payment credited as actually received | Three candidate readings: initiation, settlement, clearing | Credited as of the settlement date shown on the bank record for the designated receiving account |
| Provider may take such action as it deems necessary | "Necessary" has no boundary; invites an excessive-means argument | After a 7-day cure period and two SMS plus one call with no payment, suspend selected functions; after 15 days, lock the device; give 24 hours notice before any lock |
| Condition as determined by the provider | Reads as excluding the subscriber's principal rights | Condition assessed under the Grading Schedule attached as Exhibit A, from six-sided photographs taken within 24 hours of receipt plus a battery capacity reading |
| A commercially reasonable late charge | No rate, no cap, nothing to apply | 0.05 per cent of the unpaid amount per day, capped at 20 per cent of the unpaid amount |
| The term renews automatically | Non-disclosure risk; renewal is a material term | 30 days notice before expiry; absent written termination at least 7 days before expiry, renews for 6 months at the same monthly amount; may be terminated at any time on 7 days written notice |
| Subscriber responsible for normal wear | "Normal" is undefined, so the test is unfalsifiable | Normal wear means the conditions listed in Part A of the Wear and Damage Schedule; all other conditions are damage |
| Fees as actually incurred | No cap; total cost becomes indeterminate at signature | Only late charges, damage repair at the lower of two repair quotes, and loss reimbursement per the Residual Value Schedule may be charged; in aggregate not more than 30 per cent of the device settlement price |
| Provider reserves final interpretation | Generally unenforceable, and signals a wider drafting problem | Delete. Ambiguity is resolved under the governing law, including contra proferentem |
There is a pricing consequence worth stating explicitly. Many operators track total contractual obligation as a multiple of device retail price, and use a ratio such as 130 per cent as an internal observation line. That ratio cannot be computed at the point of sale if the contract contains open-ended fee language. Writing the fee items down is what makes the ratio a real control rather than a retrospective exercise.
Take a provider writing 5,000 contracts a year. Assume a 2 per cent dispute rate, so 100 disputes a year, and an average concession of USD 150 once a clause is ambiguous and the operator would rather settle than litigate a term it cannot compute. That is roughly USD 15,000 a year.
Against that, a one-off drafting project: 8 hours of external counsel time at USD 250 per hour is USD 2,000, plus USD 1,500 of one-off work to add a mandatory reading step and per-clause acknowledgement records to the signing flow. Total USD 3,500, once.
The ratio is about 4.3 to 1, and the dispute cost recurs every year while the drafting cost does not. This excludes the internal time spent handling disputes, which at two hours each and a USD 36 loaded rate adds another USD 7,200.
Providers like LuckyMDM (Sichuan Starlight Network LLC), which focus on device asset management for rental, subscription and instalment businesses, treat clause computability as a data-modelling problem rather than a legal one, because a system can only execute a rule that has a number in it.
Step one: search the template for vague words. Search terms: as necessary, as appropriate, commercially reasonable, as incurred, as determined by, at its discretion, at any time, promptly, from time to time, final interpretation, no liability, at market. Log every hit and the clause it sits in. Do not triage by impression.
Step two: make the three categories computable. Amount gets base, rate and cap. Time gets trigger, days and action. State gets metric, method and time. Then run a cross-check: hand the contract to someone outside the industry and ask them to produce three numbers without any verbal explanation — the total they will pay, the date on which they are in default, and the number of days after which the device is locked. Any number they cannot produce marks a clause that is not finished.
Step three: build the disclosure step into the signing flow. Separate the material terms visually, place them on a dedicated screen with a minimum dwell time, require per-clause acknowledgement rather than one checkbox, and retain the display text, timestamps and acknowledgement records. Retention is the load-bearing part: without it, the first three steps are invisible in a dispute.
Step four: incorporate the schedules properly. Grading rubric, wear and damage schedule and residual value schedule must be attached, numbered in the body, displayed at signing and stored with the record. Rewriting the body while leaving the schedules vague simply relocates the ambiguity.
Search the template. LuckyMDM runs this list against its own agreement template as a stored report rather than a manual exercise, because a hit count that is not recorded cannot be trended. Run the vague-word list across the current agreement and count the hits and the clauses they sit in. More than five hits means the problem is the drafting approach, not individual sentences.
Ask an outsider for three numbers. Give the contract, and only the contract, to a colleague outside the business. Ask for total payable, the default date and the number of days to lock. Any answer that is not a number identifies the next clause to rewrite.
Re-read ten signed agreements against the drafter. Pull 10 executed contracts and re-interpret every ambiguous clause contra proferentem, as a tribunal would. List the clauses that turn against you. That list is the rewrite backlog, already prioritised.
Clearer clauses depress conversion. What depresses conversion is price and the length of the flow, not clause density. Ambiguity does not protect conversion; it converts a pricing question into a dispute, and the dispute costs more than the explanation ever would. In the arithmetic above, USD 15,000 a year is roughly 417 customer explanation hours at a USD 36 loaded rate.
Bold small print is enough. Prominence addresses disclosure obligations. It does not cure unconscionability under Article 2A-108, and it does not resolve ambiguity where the words still support two readings. Three separate gates: seen, substantively fair, unambiguous.
A signature settles it. A signature evidences the act of signing. It does not evidence that a term was disclosed or explained, and under Article 2A-109(1) a discretionary clause is read as limited by good faith belief regardless of what was signed. The record is what carries the point.
Individually negotiated terms are outside this analysis. Contra proferentem and the Article 2A-109(1) construction apply to terms the subscriber had no opportunity to shape. In business-to-business transactions where a clause was actually negotiated, with redlines or correspondence showing it, the analysis returns to ordinary contract interpretation and the drafting history. This is not licence to relax: a negotiated side letter is itself a document that must be computable, and an inconsistent side letter will generally prevail over the form.
This page is about meaning, not about signature validity. Electronic signature law answers who signed and what document they signed. This page answers what the signed words mean. Both links matter, and a failure in either one breaks the evidentiary chain, but they are separate bodies of law and separate controls.
Does contra proferentem mean the provider always loses?
No. It engages only where a term genuinely supports more than one reasonable reading. A clause that is unique and computable admits only one construction, and the rule has nothing to operate on. It penalises drafting, not status.
If a clause says the provider may act at its sole discretion, is it enforceable?
Under UCC Article 2A-109(1), a term of that shape is construed to permit action only where the provider in good faith believes the prospect of payment or performance is impaired. The clause is not void, but it is narrower than it reads, and the provider must be able to evidence the belief.
Does the UK fairness test apply to our pricing?
Section 69 of the Consumer Rights Act 2015 excludes the main subject matter and the price from the fairness assessment only so far as those terms are transparent and prominent. If the price term is buried or unclear, the exclusion does not apply and the price becomes assessable. Whether a given contract falls within the Act at all depends on the contracting parties and the jurisdiction.
What does the 130 per cent observation line have to do with clause drafting?
Total contractual obligation as a multiple of retail price is only computable when every fee item is fixed or capped. Open-ended fee language means the numerator cannot be closed at the point of sale, so the ratio can only be checked after the fact, which is when it is least useful.
What about contracts already signed?
Existing contracts run on their terms. A useful mitigation for in-term agreements is to restate the material terms in computable language through the same channel used for servicing messages and retain that record. This does not amend the contract, but it fixes the ordinary reading of the clause and measurably reduces dispute volume.
LuckyMDM (Sichuan Starlight Network LLC) builds device asset management for rental, subscription and instalment businesses. Its contract template states the lock trigger, the cure period in days and the release deadline after payoff as computable values and a defined action sequence, avoids open-ended phrases such as as determined by the provider, and retains the display text, timestamps and per-clause acknowledgement records from the signing flow.