diff --git a/packages/phone-number-privacy/combiner/src/config.ts b/packages/phone-number-privacy/combiner/src/config.ts
index da962d4ca15..f9cc2ecda24 100644
--- a/packages/phone-number-privacy/combiner/src/config.ts
+++ b/packages/phone-number-privacy/combiner/src/config.ts
@@ -1,4 +1,10 @@
-import { BlockchainConfig, rootLogger, TestUtils, toBool } from '@celo/phone-number-privacy-common'
+import {
+  BlockchainConfig,
+  FULL_NODE_TIMEOUT_IN_MS,
+  rootLogger,
+  TestUtils,
+  toBool,
+} from '@celo/phone-number-privacy-common'
 import * as functions from 'firebase-functions'
 export function getCombinerVersion(): string {
   return process.env.npm_package_version ?? require('../package.json').version ?? '0.0.0'
@@ -29,6 +35,7 @@ export interface OdisConfig {
     currentVersion: number
     versions: string // parse as KeyVersionInfo[]
   }
+  fullNodeTimeoutMs: number
 }
 
 export interface CombinerConfig {
@@ -94,6 +101,7 @@ if (DEV_MODE) {
           },
         ]),
       },
+      fullNodeTimeoutMs: FULL_NODE_TIMEOUT_IN_MS,
     },
     domains: {
       serviceName: defaultServiceName,
@@ -126,6 +134,7 @@ if (DEV_MODE) {
           },
         ]),
       },
+      fullNodeTimeoutMs: FULL_NODE_TIMEOUT_IN_MS,
     },
   }
 } else {
@@ -150,6 +159,7 @@ if (DEV_MODE) {
         currentVersion: Number(functionConfig.pnp_keys.current_version),
         versions: functionConfig.pnp_keys.versions,
       },
+      fullNodeTimeoutMs: Number(functionConfig.pnp.full_node_timeout_ms ?? FULL_NODE_TIMEOUT_IN_MS),
     },
     domains: {
       serviceName: functionConfig.domains.service_name ?? defaultServiceName,
@@ -165,6 +175,7 @@ if (DEV_MODE) {
         currentVersion: Number(functionConfig.domains_keys.current_version),
         versions: functionConfig.domains_keys.versions,
       },
+      fullNodeTimeoutMs: Number(functionConfig.pnp.full_node_timeout_ms ?? FULL_NODE_TIMEOUT_IN_MS),
     },
   }
 }
diff --git a/packages/phone-number-privacy/combiner/src/pnp/endpoints/quota/io.ts b/packages/phone-number-privacy/combiner/src/pnp/endpoints/quota/io.ts
index 2680a560f29..64c402b7ebc 100644
--- a/packages/phone-number-privacy/combiner/src/pnp/endpoints/quota/io.ts
+++ b/packages/phone-number-privacy/combiner/src/pnp/endpoints/quota/io.ts
@@ -66,7 +66,14 @@ export class PnpQuotaIO extends IO<PnpQuotaRequest> {
   }
 
   async authenticate(request: Request<{}, {}, PnpQuotaRequest>, logger: Logger): Promise<boolean> {
-    return authenticateUser(request, this.kit, logger, this.config.shouldFailOpen)
+    return authenticateUser(
+      request,
+      this.kit,
+      logger,
+      this.config.shouldFailOpen,
+      [],
+      this.config.fullNodeTimeoutMs
+    )
   }
 
   sendSuccess(
diff --git a/packages/phone-number-privacy/combiner/src/pnp/endpoints/sign/io.legacy.ts b/packages/phone-number-privacy/combiner/src/pnp/endpoints/sign/io.legacy.ts
index f2926aed541..bfd15656083 100644
--- a/packages/phone-number-privacy/combiner/src/pnp/endpoints/sign/io.legacy.ts
+++ b/packages/phone-number-privacy/combiner/src/pnp/endpoints/sign/io.legacy.ts
@@ -85,7 +85,14 @@ export class LegacyPnpSignIO extends IO<LegacySignMessageRequest> {
     request: Request<{}, {}, LegacySignMessageRequest>,
     logger: Logger
   ): Promise<boolean> {
-    return authenticateUser(request, this.kit, logger, this.config.shouldFailOpen)
+    return authenticateUser(
+      request,
+      this.kit,
+      logger,
+      this.config.shouldFailOpen,
+      [],
+      this.config.fullNodeTimeoutMs
+    )
   }
 
   sendSuccess(
diff --git a/packages/phone-number-privacy/combiner/src/pnp/endpoints/sign/io.ts b/packages/phone-number-privacy/combiner/src/pnp/endpoints/sign/io.ts
index f008597067b..ce02dc0321b 100644
--- a/packages/phone-number-privacy/combiner/src/pnp/endpoints/sign/io.ts
+++ b/packages/phone-number-privacy/combiner/src/pnp/endpoints/sign/io.ts
@@ -84,7 +84,14 @@ export class PnpSignIO extends IO<SignMessageRequest> {
     request: Request<{}, {}, SignMessageRequest>,
     logger: Logger
   ): Promise<boolean> {
-    return authenticateUser(request, this.kit, logger, this.config.shouldFailOpen)
+    return authenticateUser(
+      request,
+      this.kit,
+      logger,
+      this.config.shouldFailOpen,
+      [],
+      this.config.fullNodeTimeoutMs
+    )
   }
 
   sendSuccess(
diff --git a/packages/phone-number-privacy/combiner/test/integration/domain.test.ts b/packages/phone-number-privacy/combiner/test/integration/domain.test.ts
index 5641c2fcdde..5f7f1f1fe50 100644
--- a/packages/phone-number-privacy/combiner/test/integration/domain.test.ts
+++ b/packages/phone-number-privacy/combiner/test/integration/domain.test.ts
@@ -13,6 +13,7 @@ import {
   domainRestrictedSignatureRequestEIP712,
   DomainRestrictedSignatureResponse,
   ErrorMessage,
+  FULL_NODE_TIMEOUT_IN_MS,
   genSessionID,
   getContractKit,
   KEY_VERSION_HEADER,
@@ -138,6 +139,7 @@ const signerConfig: SignerConfig = {
   },
   timeout: 5000,
   test_quota_bypass_percentage: 0,
+  fullNodeTimeoutMs: FULL_NODE_TIMEOUT_IN_MS,
 }
 
 describe('domainService', () => {
diff --git a/packages/phone-number-privacy/combiner/test/integration/legacypnp.test.ts b/packages/phone-number-privacy/combiner/test/integration/legacypnp.test.ts
index 630959579ef..1506015c289 100644
--- a/packages/phone-number-privacy/combiner/test/integration/legacypnp.test.ts
+++ b/packages/phone-number-privacy/combiner/test/integration/legacypnp.test.ts
@@ -3,6 +3,7 @@ import {
   AuthenticationMethod,
   CombinerEndpoint,
   ErrorMessage,
+  FULL_NODE_TIMEOUT_IN_MS,
   genSessionID,
   KEY_VERSION_HEADER,
   LegacySignMessageRequest,
@@ -142,6 +143,7 @@ const signerConfig: SignerConfig = {
   },
   timeout: 5000,
   test_quota_bypass_percentage: 0,
+  fullNodeTimeoutMs: FULL_NODE_TIMEOUT_IN_MS,
 }
 
 const testBlockNumber = 1000000
diff --git a/packages/phone-number-privacy/combiner/test/integration/pnp.test.ts b/packages/phone-number-privacy/combiner/test/integration/pnp.test.ts
index 54fd0884dd5..f74d4432bf5 100644
--- a/packages/phone-number-privacy/combiner/test/integration/pnp.test.ts
+++ b/packages/phone-number-privacy/combiner/test/integration/pnp.test.ts
@@ -3,6 +3,7 @@ import {
   AuthenticationMethod,
   CombinerEndpoint,
   ErrorMessage,
+  FULL_NODE_TIMEOUT_IN_MS,
   genSessionID,
   KEY_VERSION_HEADER,
   PnpQuotaRequest,
@@ -146,6 +147,7 @@ const signerConfig: SignerConfig = {
   },
   timeout: 5000,
   test_quota_bypass_percentage: 0,
+  fullNodeTimeoutMs: FULL_NODE_TIMEOUT_IN_MS,
 }
 
 const testBlockNumber = 1000000
diff --git a/packages/phone-number-privacy/common/src/utils/authentication.ts b/packages/phone-number-privacy/common/src/utils/authentication.ts
index cc30def42d9..79c70acca0a 100644
--- a/packages/phone-number-privacy/common/src/utils/authentication.ts
+++ b/packages/phone-number-privacy/common/src/utils/authentication.ts
@@ -25,7 +25,8 @@ export async function authenticateUser<R extends PhoneNumberPrivacyRequest>(
   contractKit: ContractKit,
   logger: Logger,
   shouldFailOpen: boolean = false,
-  warnings: ErrorType[] = []
+  warnings: ErrorType[] = [],
+  timeoutMs: number = FULL_NODE_TIMEOUT_IN_MS
 ): Promise<boolean> {
   logger.debug('Authenticating user')
 
@@ -42,7 +43,7 @@ export async function authenticateUser<R extends PhoneNumberPrivacyRequest>(
   if (authMethod && authMethod === AuthenticationMethod.ENCRYPTION_KEY) {
     let registeredEncryptionKey
     try {
-      registeredEncryptionKey = await getDataEncryptionKey(signer, contractKit, logger)
+      registeredEncryptionKey = await getDataEncryptionKey(signer, contractKit, logger, timeoutMs)
     } catch (err) {
       // getDataEncryptionKey should only throw if there is a full-node connection issue.
       // That is, it does not throw if the DEK is undefined or invalid
@@ -127,7 +128,8 @@ export function verifyDEKSignature(
 export async function getDataEncryptionKey(
   address: string,
   contractKit: ContractKit,
-  logger: Logger
+  logger: Logger,
+  timeoutMs: number
 ): Promise<string> {
   try {
     const res = await retryAsyncWithBackOffAndTimeout(
@@ -139,7 +141,7 @@ export async function getDataEncryptionKey(
       [],
       RETRY_DELAY_IN_MS,
       1.5,
-      FULL_NODE_TIMEOUT_IN_MS
+      timeoutMs
     )
     return res
   } catch (error) {
diff --git a/packages/phone-number-privacy/signer/src/config.ts b/packages/phone-number-privacy/signer/src/config.ts
index cfa3881b91f..588a95dd3ee 100644
--- a/packages/phone-number-privacy/signer/src/config.ts
+++ b/packages/phone-number-privacy/signer/src/config.ts
@@ -1,4 +1,8 @@
-import { BlockchainConfig, toBool } from '@celo/phone-number-privacy-common'
+import {
+  BlockchainConfig,
+  FULL_NODE_TIMEOUT_IN_MS,
+  toBool,
+} from '@celo/phone-number-privacy-common'
 import BigNumber from 'bignumber.js'
 
 require('dotenv').config()
@@ -94,6 +98,7 @@ export interface SignerConfig {
   }
   timeout: number
   test_quota_bypass_percentage: number
+  fullNodeTimeoutMs: number
 }
 
 const env = process.env as any
@@ -175,4 +180,5 @@ export const config: SignerConfig = {
   },
   timeout: Number(env.ODIS_SIGNER_TIMEOUT ?? 5000),
   test_quota_bypass_percentage: Number(env.TEST_QUOTA_BYPASS_PERCENTAGE ?? 0),
+  fullNodeTimeoutMs: Number(env.TIMEOUT_MS ?? FULL_NODE_TIMEOUT_IN_MS),
 }
diff --git a/packages/phone-number-privacy/signer/src/pnp/endpoints/quota/io.legacy.ts b/packages/phone-number-privacy/signer/src/pnp/endpoints/quota/io.legacy.ts
index b9cb4e9e7fc..7fd5ed0bb3d 100644
--- a/packages/phone-number-privacy/signer/src/pnp/endpoints/quota/io.legacy.ts
+++ b/packages/phone-number-privacy/signer/src/pnp/endpoints/quota/io.legacy.ts
@@ -28,6 +28,7 @@ export class LegacyPnpQuotaIO extends IO<LegacyPnpQuotaRequest> {
   constructor(
     readonly enabled: boolean,
     readonly shouldFailOpen: boolean,
+    readonly timeoutMs: number,
     readonly kit: ContractKit
   ) {
     super(enabled)
@@ -64,7 +65,14 @@ export class LegacyPnpQuotaIO extends IO<LegacyPnpQuotaRequest> {
     warnings: ErrorType[],
     logger: Logger
   ): Promise<boolean> {
-    return authenticateUser(request, this.kit, logger, this.shouldFailOpen, warnings)
+    return authenticateUser(
+      request,
+      this.kit,
+      logger,
+      this.shouldFailOpen,
+      warnings,
+      this.timeoutMs
+    )
   }
 
   sendSuccess(
diff --git a/packages/phone-number-privacy/signer/src/pnp/endpoints/quota/io.ts b/packages/phone-number-privacy/signer/src/pnp/endpoints/quota/io.ts
index 3a367fae728..727ac3cdceb 100644
--- a/packages/phone-number-privacy/signer/src/pnp/endpoints/quota/io.ts
+++ b/packages/phone-number-privacy/signer/src/pnp/endpoints/quota/io.ts
@@ -27,6 +27,7 @@ export class PnpQuotaIO extends IO<PnpQuotaRequest> {
   constructor(
     readonly enabled: boolean,
     readonly shouldFailOpen: boolean,
+    readonly timeoutMs: number,
     readonly kit: ContractKit
   ) {
     super(enabled)
@@ -62,7 +63,14 @@ export class PnpQuotaIO extends IO<PnpQuotaRequest> {
     warnings: ErrorType[],
     logger: Logger
   ): Promise<boolean> {
-    return authenticateUser(request, this.kit, logger, this.shouldFailOpen, warnings)
+    return authenticateUser(
+      request,
+      this.kit,
+      logger,
+      this.shouldFailOpen,
+      warnings,
+      this.timeoutMs
+    )
   }
 
   sendSuccess(
diff --git a/packages/phone-number-privacy/signer/src/pnp/endpoints/sign/io.legacy.ts b/packages/phone-number-privacy/signer/src/pnp/endpoints/sign/io.legacy.ts
index 70d8068aa07..f4617119f74 100644
--- a/packages/phone-number-privacy/signer/src/pnp/endpoints/sign/io.legacy.ts
+++ b/packages/phone-number-privacy/signer/src/pnp/endpoints/sign/io.legacy.ts
@@ -32,6 +32,7 @@ export class LegacyPnpSignIO extends IO<LegacySignMessageRequest> {
   constructor(
     readonly enabled: boolean,
     readonly shouldFailOpen: boolean,
+    readonly timeoutMs: number,
     readonly kit: ContractKit
   ) {
     super(enabled)
@@ -76,7 +77,14 @@ export class LegacyPnpSignIO extends IO<LegacySignMessageRequest> {
     warnings: ErrorType[],
     logger: Logger
   ): Promise<boolean> {
-    return authenticateUser(request, this.kit, logger, this.shouldFailOpen, warnings)
+    return authenticateUser(
+      request,
+      this.kit,
+      logger,
+      this.shouldFailOpen,
+      warnings,
+      this.timeoutMs
+    )
   }
 
   sendSuccess(
diff --git a/packages/phone-number-privacy/signer/src/pnp/endpoints/sign/io.ts b/packages/phone-number-privacy/signer/src/pnp/endpoints/sign/io.ts
index 7e522defd0a..6761fd797d2 100644
--- a/packages/phone-number-privacy/signer/src/pnp/endpoints/sign/io.ts
+++ b/packages/phone-number-privacy/signer/src/pnp/endpoints/sign/io.ts
@@ -31,6 +31,7 @@ export class PnpSignIO extends IO<SignMessageRequest> {
   constructor(
     readonly enabled: boolean,
     readonly shouldFailOpen: boolean,
+    readonly timeoutMs: number,
     readonly kit: ContractKit
   ) {
     super(enabled)
@@ -72,7 +73,14 @@ export class PnpSignIO extends IO<SignMessageRequest> {
     warnings: ErrorType[],
     logger: Logger
   ): Promise<boolean> {
-    return authenticateUser(request, this.kit, logger, this.shouldFailOpen, warnings)
+    return authenticateUser(
+      request,
+      this.kit,
+      logger,
+      this.shouldFailOpen,
+      warnings,
+      this.timeoutMs
+    )
   }
 
   sendSuccess(
diff --git a/packages/phone-number-privacy/signer/src/server.ts b/packages/phone-number-privacy/signer/src/server.ts
index 7b0ba8d472b..19558bfc396 100644
--- a/packages/phone-number-privacy/signer/src/server.ts
+++ b/packages/phone-number-privacy/signer/src/server.ts
@@ -98,6 +98,7 @@ export function startSigner(
       new PnpQuotaIO(
         config.api.phoneNumberPrivacy.enabled,
         config.api.phoneNumberPrivacy.shouldFailOpen, // TODO (https://github.com/celo-org/celo-monorepo/issues/9862) consider refactoring config to make the code cleaner
+        config.fullNodeTimeoutMs,
         kit
       )
     )
@@ -111,6 +112,7 @@ export function startSigner(
       new PnpSignIO(
         config.api.phoneNumberPrivacy.enabled,
         config.api.phoneNumberPrivacy.shouldFailOpen,
+        config.fullNodeTimeoutMs,
         kit
       )
     )
@@ -124,6 +126,7 @@ export function startSigner(
       new LegacyPnpSignIO(
         config.api.legacyPhoneNumberPrivacy.enabled,
         config.api.legacyPhoneNumberPrivacy.shouldFailOpen,
+        config.fullNodeTimeoutMs,
         kit
       )
     )
@@ -135,6 +138,7 @@ export function startSigner(
       new LegacyPnpQuotaIO(
         config.api.legacyPhoneNumberPrivacy.enabled,
         config.api.legacyPhoneNumberPrivacy.shouldFailOpen,
+        config.fullNodeTimeoutMs,
         kit
       )
     )