diff --git a/packages/xrpl/src/models/transactions/paymentChannelClaim.ts b/packages/xrpl/src/models/transactions/paymentChannelClaim.ts
index 6b25a967..5c89178f 100644
--- a/packages/xrpl/src/models/transactions/paymentChannelClaim.ts
+++ b/packages/xrpl/src/models/transactions/paymentChannelClaim.ts
@@ -31,8 +31,8 @@ export enum PaymentChannelClaimFlags {
    * the channel to the close time of the previous ledger plus the channel's
    * SettleDelay time, unless the channel already has an earlier Expiration
    * time.) If the destination address uses this flag when the channel still
-   * holds an amount, any amount that remains after processing the claim is returned to
-   * the source address.
+   * holds an amount, any amount that remains after processing the claim is
+   * returned to the source address.
    */
   tfClose = 0x00020000,
 }
@@ -91,8 +91,8 @@ export interface PaymentChannelClaimFlagsInterface extends GlobalFlags {
    * the channel to the close time of the previous ledger plus the channel's
    * SettleDelay time, unless the channel already has an earlier Expiration
    * time.) If the destination address uses this flag when the channel still
-   * holds an amount, any amount that remains after processing the claim is returned to
-   * the source address.
+   * holds an amount, any amount that remains after processing the claim is
+   * returned to the source address.
    */
   tfClose?: boolean
 }
@@ -118,7 +118,7 @@ export interface PaymentChannelClaim extends BaseTransaction {
   /**
    * The amount authorized by the Signature. This must match the amount in the
    * signed message. This is the cumulative amount that can be dispensed by the
-   * channel, including amounts previously redeemed.
+   * channel, including amounts previously redeemed. Required unless closing the channel.
    */
   Amount?: Amount
   /**
@@ -154,11 +154,11 @@ export function validatePaymentChannelClaim(tx: Record<string, unknown>): void {
   }
 
   if (tx.Balance !== undefined && !isAmount(tx.Balance)) {
-    throw new ValidationError('PaymentChannelClaim: invalid Balance')
+    throw new ValidationError('PaymentChannelClaim: Balance must be an Amount')
   }
 
   if (tx.Amount !== undefined && !isAmount(tx.Amount)) {
-    throw new ValidationError('PaymentChannelClaim: invalid Amount')
+    throw new ValidationError('PaymentChannelClaim: Amount must be an Amount')
   }
 
   if (tx.Signature !== undefined && typeof tx.Signature !== 'string') {
diff --git a/packages/xrpl/src/models/transactions/paymentChannelCreate.ts b/packages/xrpl/src/models/transactions/paymentChannelCreate.ts
index c4f2070f..90f98ea6 100644
--- a/packages/xrpl/src/models/transactions/paymentChannelCreate.ts
+++ b/packages/xrpl/src/models/transactions/paymentChannelCreate.ts
@@ -67,7 +67,7 @@ export function validatePaymentChannelCreate(
   }
 
   if (typeof tx.Amount !== 'string' && !isAmount(tx.Amount)) {
-    throw new ValidationError('PaymentChannelCreate: invalid Amount')
+    throw new ValidationError('PaymentChannelCreate: Amount must be an Amount')
   }
 
   if (tx.Destination === undefined) {
diff --git a/packages/xrpl/src/models/transactions/paymentChannelFund.ts b/packages/xrpl/src/models/transactions/paymentChannelFund.ts
index 1f835c46..5c381461 100644
--- a/packages/xrpl/src/models/transactions/paymentChannelFund.ts
+++ b/packages/xrpl/src/models/transactions/paymentChannelFund.ts
@@ -56,7 +56,7 @@ export function validatePaymentChannelFund(tx: Record<string, unknown>): void {
   }
 
   if (typeof tx.Amount !== 'string' && !isAmount(tx.Amount)) {
-    throw new ValidationError('PaymentChannelFund: invalid Amount')
+    throw new ValidationError('PaymentChannelFund: Amount must be an Amount')
   }
 
   if (tx.Expiration !== undefined && typeof tx.Expiration !== 'number') {