Once a written contract exists, a later phone call or email can still genuinely change it, but not every conversation does; a factory needs to recognize the difference between a real amendment and an informal comment that changes nothing. Anyone who negotiates by phone, or is told "we agreed this on the call," needs to know when that exchange actually binds the written contract, and when it does not.
Delta Garments meets this on Order B (the jeans), a hybrid order handled partly through Meridian Sourcing, the agent working on Northline Apparel's own behalf. Mona, the merchandiser, cannot assume every email from Meridian changes the written contract, nor that a contract can never be changed by an email; the real rule sits between those two extremes.
Without this skill, a factory can wrongly treat a comment as binding and act too soon, or wrongly treat a real change as non-binding and ignore an accepted obligation. This lesson states the rule and works through a real exchange between Meridian Sourcing and Delta Garments on Order B (the jeans).
You need: lessons 16.2.1 through 16.2.3, since this lesson tests whether a verbal or email exchange changes the six commitments, standard terms, and liability clauses those lessons already teach how to read.
By the end of this lesson you can:
Not covered here: the specific content of liability and penalty clauses is lesson 16.2.3's own subject, already covered; assembling every clause into one complete checklist is lesson 16.2.5's own subject.
| Term | Meaning |
|---|---|
| Amendment | A written change to a purchase order's price, quantity or date, agreed by both sides and recorded on the order itself. |
| Written confirmation | A dated message, letter or amended purchase order that records what both sides agreed, so neither side can later deny it. |
| Authority to bind | Whether the person making a statement, such as an agent, actually has the power to change the contract on the buyer's own behalf. |
| Mutual assent | Both parties clearly agreeing to the same specific change, not just one side proposing it. |
| Informal comment | A remark made in conversation or email that expresses an opinion or a hope, without either side treating it as a binding change. |
| Course of dealing | A pattern of past behaviour between two parties that can itself become evidence of what they intended, even without a single clear statement. |
A written contract is not frozen the moment it is signed; the two sides can still change it later, including by phone or email. But not every conversation does this. For an exchange to actually bind the contract, two conditions must both be true: both sides must clearly agree to a specific, identifiable change, not just discuss the idea of one, and the person agreeing on each side must actually have the authority to make that change. An agent who has full authority to agree a price change binds the buyer; an agent merely passing along a buyer's own comment does not. Confirming a change in writing afterwards does not create the agreement, but it does remove any doubt about what was actually agreed.
| What can differ | The shapes you will meet | Why it matters |
|---|---|---|
| A hybrid order handled through an agent, such as Order B (the jeans) through Meridian Sourcing | The agent may have full authority to agree some changes on the buyer's own behalf, but only relay other comments back to the buyer for a decision. | A factory must know which kind of message it is receiving from the agent before treating it as a binding change. |
| A direct export relationship with no agent | The buyer's own named contact, such as Sara at Northline Apparel, either has authority to agree a change directly or must check with someone else first. | The same two-condition rule applies; only the number of people in the chain differs. |
| A domestic, ongoing relationship, such as Cedar & Co.'s own account with Delta Garments | A long course of dealing between the two sides can itself carry weight, even without a single clear written confirmation of every small change. | A pattern of past behaviour can support what was intended, but a factory should still record any specific, larger change in writing. |
| A hosiery, terry or home-textile order rather than a cut-and-sew garment order | The same two-condition rule applies; only the goods and the specific change discussed differ. | Confirms the rule is general to any contract, not specific to garments. |
Meridian Sourcing, the agent working on Northline Apparel's own behalf on Order B (the jeans), emails Mona to say Northline is considering asking for a one-week extension to the delivery date, and asks whether Delta Garments could accommodate it if asked. Mona recognizes this as an informal comment, not a binding change: Meridian's own email raises the possibility and asks a question, it does not state that Northline has decided, and it does not state that Meridian has authority to agree the change on Northline's own behalf without a further confirmation.
The worked numberOrder B (the jeans)'s own fixed figures show what is at stake if Delta Garments wrongly commits to a schedule change before it is actually agreed.
A common mistake runs in both directions: treating an informal comment, such as Meridian's own question about a possible extension, as if it already changed Order B (the jeans)'s own written contract, and separately, dismissing a genuine, clearly agreed change sent only by email as not real because it was not formally reissued on paper. Both mistakes come from not applying the same two-condition test consistently; a factory that checks for clear mutual agreement and real authority every time avoids acting too early on nothing and ignoring something real.
A written contract can still be changed later by phone or email, but only if both sides clearly agree to a specific change and the person agreeing actually has the power to make it. A question, a comment, or someone simply passing along what a buyer might want is not the same as an agreed change; nothing has actually changed until both conditions are met. This matters on Order B (the jeans), a hybrid order handled partly through Meridian Sourcing, since an agent's own email can carry real authority to agree a change, or it can simply be relaying a question that needs a further answer before anything is settled. Getting this wrong in either direction costs something: acting on a comment that was never actually agreed wastes real capacity, and dismissing a real change sent only by email as not binding ignores an obligation the factory has actually accepted.
Three days after the first informal comment, Meridian Sourcing emails Mona again, this time stating that Northline Apparel has confirmed it wants to extend Order B (the jeans)'s own delivery date by one week, and that Meridian has been authorized to agree this change on Northline's own behalf.
The document Mona reads:
Should Mona treat this second email as a binding change to Order B (the jeans)'s own written contract, or wait for a further, separately signed amendment before updating the schedule? Decide before opening the answer.
Mona should treat this second email as a binding change and update Delta Garments' own production schedule accordingly, while still keeping the email on file as the written confirmation.
First fact. The second email meets both conditions this lesson's own rule requires: Northline has clearly agreed a specific change, the one-week extension, and Meridian states it has actual authority to agree it on Northline's own behalf.
Second fact. A written, dated email stating a specific agreed change and confirming authority to make it is itself a form of written confirmation; waiting for a separately signed and reissued document adds delay without adding any real certainty the email does not already provide.
Updating the schedule now avoids the wasted capacity a further delay would cost; keeping Meridian's own email on file, per lesson 16.2.5's own checklist, gives Delta Garments the same record a reissued document would, at no additional cost.
Order B (the jeans)'s own total contract value is USD 29,400 (9.80 × 3,000, from this lesson's own worked number), unchanged by the one-week extension itself. The real cost this lesson addresses is not to that contract value but to Delta Garments' own production schedule: treating the first, informal email as binding would have wasted a week of capacity for nothing, while correctly waiting for the second, properly authorized email before rescheduling avoids that cost entirely, for no loss of time once the genuine confirmation actually arrives.
Open the Contract review checklist and add a row for every verbal or email exchange about Order B (the jeans), recording the date, what was discussed, whether both conditions of this lesson's own rule were met, and whether the exchange is binding or only informal. Note which side made the statement and whether authority to agree it was actually stated, not merely assumed, since this is the detail a later dispute most often turns on. Download link: `templates/T16-C02-contract-review-checklist.xlsx`.
1. According to this lesson, what two conditions must both be true for a verbal or email exchange to bind a written contract?
2. In the worked scenario, why should Mona treat Meridian Sourcing's own second email as binding on Order B (the jeans)?
| EN | AR | FR | TR | Meaning |
|---|---|---|---|---|
| Amendment | تعديل الطلبية | Avenant | Sipariş değişikliği | A written change to a purchase order's price, quantity or date, agreed by both sides and recorded on the order itself. |
| Written confirmation | تأكيد كتابي | Confirmation écrite | Yazılı teyit | A dated message, letter or amended purchase order that records what both sides agreed, so neither side can later deny it. |
| Authority to bind | صلاحية الإلزام | Pouvoir d'engager | Bağlama yetkisi | Whether the person making a statement, such as an agent, actually has the power to change the contract on the buyer's own behalf. |
| Mutual assent | الرضا المتبادل | Consentement mutuel | Karşılıklı rıza | Both parties clearly agreeing to the same specific change, not just one side proposing it. |
| Informal comment | ملاحظة غير رسمية | Remarque informelle | Gayri resmi yorum | A remark made in conversation or email that expresses an opinion or a hope, without either side treating it as a binding change. |
| Course of dealing | نمط التعامل السابق | Pratique antérieure des parties | Önceki iş yapış biçimi | A pattern of past behaviour between two parties that can itself become evidence of what they intended, even without a single clear statement. |
The final lesson brings together every rule from this course into one complete contract-review checklist, applied to a domestic, make-to-stock account, showing how each lesson's own rule fits into a single working record a factory can actually use. Back to the course map