PP-13359: Adds information about new 30p min Stripe payment (#987)

source/api_reference/create_a_payment_reference/index.html.md.erb

@@ -30,7 +30,7 @@ The data from this endpoint is ‘strongly consistent’, meaning it is updated
 
 | Name | Type | Description |
 |-----|-----|-----|
-| `amount` (required) | number | Sets the amount the user will pay, in pence.<br><br>Maximum value is `10000000` (£100,000) if your PSP is Stripe. [Contact us](/support_contact_and_more_information/) to take payments above this amount.<br><br>Maximum value is `500000` (£5,000) if your PSP is Worldpay. [Contact Government Banking](mailto:[email protected]) to take payments above this amount. |
+| `amount` (required) | number | Sets the amount the user will pay, in pence.<br><br>Minimum value depends on your PSP. If your PSP is: <li>Stripe, the minimum value is `30` (30 pence) <li>Worldpay, [contact Government Banking](mailto:[email protected]) to find out your minimum `amount` value<br><br>Maximum value is `10000000` (£100,000) if your PSP is Stripe. [Contact us](/support_contact_and_more_information/) to take payments above this amount.<br><br>Maximum value is `500000` (£5,000) if your PSP is Worldpay. [Contact Government Banking](mailto:[email protected]) to take payments above this amount. |
 | `reference` (required) | string | Associate a reference with this payment. <br><br>`reference` is not unique - multiple payments can have identical `reference` values.<br><br>Limited to 255 characters and must not contain URLs. |
 | `return_url` (required) | string | The URL the paying user is directed to after their payment journey on GOV.UK Pay ends.<br><br>Limited to 2,000 characters and must not be JSON-encoded.<br><br>You can [read more about choosing your return URL and matching paying users to payments](/making_payments/#choose-the-return-url-and-match-your-users-to-payments). |
 | `description` (required) | string | A human-readable description of the payment you're creating. Paying users see this description on the payment pages. Service staff see the description in the GOV.UK Pay admin tool.<br><br>Limited to 255 characters and should not contain URLs. |

source/making_payments/index.html.md.erb

@@ -68,16 +68,16 @@ Consider prefilling some payment fields if your service already collects any det
 
 The `amount` parameter sets the payment amount in pence. `amount` must be a number.
 
-The minimum amount is one pence plus your payment service provider's (PSP's) transaction fee. To see your PSP's transaction fee, check your contract by either:
+The minimum amount depends on your payment service provider (PSP). 
 
-- signing into the [GOV.UK Pay admin tool](https://selfservice.payments.service.gov.uk/login) if you use Stripe
-- [contacting Government Banking](mailto:[email protected]) if you are using Worldpay
-- asking your PSP
+If you use Stripe, the minimum `amount` value is `30` (30 pence).
+
+If you use Worldpay, you need to contact Government Banking or ask Worldpay directly to find out your minimum payment amount.
 
 The maximum amount is either:
 
 - 10,000,000 pence (£100,000)
-- 500,000 pence (£5,000) if you use Government Banking
+- 500,000 pence (£5,000) if you use Worldpay
 
 ## Receiving the API response