diff --git a/packages/xrpl/src/models/transactions/AMMDeposit.ts b/packages/xrpl/src/models/transactions/AMMDeposit.ts
index fca1ae4c..d01a5b3b 100644
--- a/packages/xrpl/src/models/transactions/AMMDeposit.ts
+++ b/packages/xrpl/src/models/transactions/AMMDeposit.ts
@@ -61,7 +61,7 @@ export interface AMMDeposit extends BaseTransaction {
 export function validateAMMDeposit(tx: Record<string, unknown>): void {
   validateBaseTransaction(tx)
 
-  if (tx.AMMID === undefined) {
+  if (tx.AMMID == null) {
     throw new ValidationError('AMMDeposit: missing field AMMID')
   }
 
@@ -69,31 +69,31 @@ export function validateAMMDeposit(tx: Record<string, unknown>): void {
     throw new ValidationError('AMMDeposit: AMMID must be a string')
   }
 
-  if (tx.Asset2In !== undefined && tx.Asset1In === undefined) {
+  if (tx.Asset2In != null && tx.Asset1In == null) {
     throw new ValidationError('AMMDeposit: must set Asset1In with Asset2In')
-  } else if (tx.EPrice !== undefined && tx.Asset1In === undefined) {
+  } else if (tx.EPrice != null && tx.Asset1In == null) {
     throw new ValidationError('AMMDeposit: must set Asset1In with EPrice')
-  } else if (tx.LPToken === undefined && tx.Asset1In === undefined) {
+  } else if (tx.LPToken == null && tx.Asset1In == null) {
     throw new ValidationError(
       'AMMDeposit: must set either or both LPToken with Asset1In',
     )
   }
 
-  if (tx.LPToken !== undefined && !isIssuedCurrency(tx.LPToken)) {
+  if (tx.LPToken != null && !isIssuedCurrency(tx.LPToken)) {
     throw new ValidationError(
       'AMMDeposit: LPToken must be an IssuedCurrencyAmount',
     )
   }
 
-  if (tx.Asset1In !== undefined && !isAmount(tx.Asset1In)) {
+  if (tx.Asset1In != null && !isAmount(tx.Asset1In)) {
     throw new ValidationError('AMMDeposit: Asset1In must be an Amount')
   }
 
-  if (tx.Asset2In !== undefined && !isAmount(tx.Asset2In)) {
+  if (tx.Asset2In != null && !isAmount(tx.Asset2In)) {
     throw new ValidationError('AMMDeposit: Asset2In must be an Amount')
   }
 
-  if (tx.EPrice !== undefined && typeof tx.EPrice !== 'string') {
+  if (tx.EPrice != null && typeof tx.EPrice !== 'string') {
     throw new ValidationError('AMMDeposit: EPrice must be a string')
   }
 }
diff --git a/packages/xrpl/src/models/transactions/AMMInstanceCreate.ts b/packages/xrpl/src/models/transactions/AMMInstanceCreate.ts
index 637f9c25..3ac676b4 100644
--- a/packages/xrpl/src/models/transactions/AMMInstanceCreate.ts
+++ b/packages/xrpl/src/models/transactions/AMMInstanceCreate.ts
@@ -44,7 +44,7 @@ export interface AMMInstanceCreate extends BaseTransaction {
 export function validateAMMInstanceCreate(tx: Record<string, unknown>): void {
   validateBaseTransaction(tx)
 
-  if (tx.Asset1 === undefined) {
+  if (tx.Asset1 == null) {
     throw new ValidationError('AMMInstanceCreate: missing field Asset1')
   }
 
@@ -52,7 +52,7 @@ export function validateAMMInstanceCreate(tx: Record<string, unknown>): void {
     throw new ValidationError('AMMInstanceCreate: Asset1 must be an Amount')
   }
 
-  if (tx.Asset2 === undefined) {
+  if (tx.Asset2 == null) {
     throw new ValidationError('AMMInstanceCreate: missing field Asset2')
   }
 
@@ -60,7 +60,7 @@ export function validateAMMInstanceCreate(tx: Record<string, unknown>): void {
     throw new ValidationError('AMMInstanceCreate: Asset2 must be an Amount')
   }
 
-  if (tx.TradingFee === undefined) {
+  if (tx.TradingFee == null) {
     throw new ValidationError('AMMInstanceCreate: missing field TradingFee')
   }