diff --git a/docs/payments.md b/docs/payments.md
index 4de9177..0c13c3a 100644
--- a/docs/payments.md
+++ b/docs/payments.md
@@ -98,8 +98,9 @@ norbix payments integration save --provider Montonio --name "Montonio sandbox" -
 | `norbix payments order create --buyer <usr_…> --reference <ref> --key <key> --line <sku:qty:cents[:title]>... [--meta k=v]... [--currency EUR] [--price-version v1] [--file <json>]` | create an order for one buyer | `POST /orders` |
 | `norbix payments order checkout <id> --integration <id> --return-url <url> [--method <m>] [--country <cc>] [--provider <code>]` | start or reuse the checkout; answers the payment URL | `POST /orders/{Id}/checkout` |
 
-The price is yours: Norbix adds up the lines (whole cents, EUR) and never
-reads a price from the buyer. `--key` is the idempotency key: the same key with
+The price is yours: Norbix adds up the lines (whole cents, EUR — at least 1
+cent per unit) and never reads a price from the buyer. Every line needs a title;
+`--line` without one uses the sku. `--key` is the idempotency key: the same key with
 the same body returns the same order, with another body it is refused (409).
 Creating an order needs a key whose role has "Payments — full access" (or
 Administrator); a buyer can read and check out only their own orders.
diff --git a/src/commands/payments/order/create.ts b/src/commands/payments/order/create.ts
index ec47c1f..f9a2d54 100644
--- a/src/commands/payments/order/create.ts
+++ b/src/commands/payments/order/create.ts
@@ -7,7 +7,8 @@ export default class PaymentsOrderCreate extends BaseCommand {
   static description = `Create a payment order for one buyer
 
 The price is yours: give each line as --line sku:quantity:unitCents[:title]
-(repeat for several); Norbix adds up the total in cents. --key is the
+(repeat for several; without a title the sku is used as the title); Norbix
+adds up the total in cents. --key is the
 idempotency key (8 characters or more): the same key with the same body
 returns the same order, the same key with another body is refused. Needs a
 key whose role may create orders (Payments — full access, or Administrator).
diff --git a/src/lib/payments.ts b/src/lib/payments.ts
index 5da6f12..8bd18c1 100644
--- a/src/lib/payments.ts
+++ b/src/lib/payments.ts
@@ -48,16 +48,17 @@ export const PAYMENT_PROVIDERS = [
 
 /**
  * One order line from `--line sku:quantity:unitCents[:title]` — e.g. `star-day:21:30`.
+ * The server requires a title on every line: without one, the sku is the title.
  * A title with spaces goes in --file instead.
  */
 export function parseOrderLine(raw: string): {sku: string; quantity: number; unitAmountMinor: number; title?: string} {
   const [sku, quantity, unit, ...title] = raw.split(':')
   const q = Number(quantity)
   const u = Number(unit)
-  if (!sku || !Number.isInteger(q) || q < 1 || !Number.isInteger(u) || u < 0) {
-    throw new Error(`--line "${raw}" must be sku:quantity:unitCents[:title], e.g. star-day:21:30 (quantity 1 or more, cents 0 or more)`)
+  if (!sku || !Number.isInteger(q) || q < 1 || !Number.isInteger(u) || u < 1) {
+    throw new Error(`--line "${raw}" must be sku:quantity:unitCents[:title], e.g. star-day:21:30 (quantity 1 or more, cents 1 or more)`)
   }
-  return title.length > 0 ? {sku, quantity: q, unitAmountMinor: u, title: title.join(':')} : {sku, quantity: q, unitAmountMinor: u}
+  return {sku, quantity: q, unitAmountMinor: u, title: title.length > 0 ? title.join(':') : sku}
 }
 
 /** `--meta key=value` (repeatable) → a string map. */
diff --git a/tests/payments-routes.test.ts b/tests/payments-routes.test.ts
index 81252db..cde5d52 100644
--- a/tests/payments-routes.test.ts
+++ b/tests/payments-routes.test.ts
@@ -312,7 +312,7 @@ describe('payments order create', () => {
       currency: 'EUR',
       priceVersion: 'v1',
       lines: [
-        {sku: 'star-day', quantity: 21, unitAmountMinor: 30},
+        {sku: 'star-day', quantity: 21, unitAmountMinor: 30, title: 'star-day'},
         {sku: 'highlight-day', quantity: 7, unitAmountMinor: 30, title: 'Highlight'},
       ],
       metadata: {adId: 'ad_1042'},
@@ -335,6 +335,12 @@ describe('payments order create', () => {
     })
   })
 
+  it('refuses a 0-cent line (the server needs 1 cent or more)', async () => {
+    const {error} = await runCommand(['payments', 'order', 'create', '--line', 'star-day:21:0', ...globalArgs])
+    expect(error?.message).toMatch(/cents 1 or more/)
+    expect(calls).toHaveLength(0)
+  })
+
   it('refuses a malformed --line before sending anything', async () => {
     const {error} = await runCommand(['payments', 'order', 'create', '--line', 'star-day:zero:30', ...globalArgs])
     expect(error?.message).toMatch(/must be sku:quantity:unitCents/)