diff --git a/packages/zoe/package.json b/packages/zoe/package.json
index bb33081e34c..d836ed12796 100644
--- a/packages/zoe/package.json
+++ b/packages/zoe/package.json
@@ -63,6 +63,7 @@
     "@endo/import-bundle": "^1.1.2",
     "@endo/marshal": "^1.5.0",
     "@endo/nat": "^5.0.7",
+    "@endo/pass-style": "^1.4.0",
     "@endo/patterns": "^1.4.0",
     "@endo/promise-kit": "^1.1.2",
     "yargs-parser": "^21.1.1"
diff --git a/packages/zoe/src/contractFacet/typeGuards.js b/packages/zoe/src/contractFacet/typeGuards.js
new file mode 100644
index 00000000000..044a283298e
--- /dev/null
+++ b/packages/zoe/src/contractFacet/typeGuards.js
@@ -0,0 +1,25 @@
+import { M } from '@endo/patterns';
+import { AmountKeywordRecordShape, IssuerRecordShape } from '../typeGuards.js';
+
+export const ZcfSeatShape = M.remotable('zcfSeat');
+
+export const ZcfMintI = M.interface('ZcfMint', {
+  getIssuerRecord: M.call().returns(IssuerRecordShape),
+  mintGains: M.call(AmountKeywordRecordShape)
+    .optional(ZcfSeatShape)
+    .returns(ZcfSeatShape),
+  burnLosses: M.call(AmountKeywordRecordShape, ZcfSeatShape).returns(),
+});
+
+export const ZcfI = M.interface(
+  'ZCF',
+  {
+    makeInvitation: M.call(M.raw(), M.string())
+      .optional(M.record(), M.pattern())
+      .returns(M.promise()),
+    setTestJig: M.call().optional(M.raw()).returns(),
+  },
+  {
+    defaultGuards: 'passable',
+  },
+);
diff --git a/packages/zoe/src/contractFacet/zcfMint.js b/packages/zoe/src/contractFacet/zcfMint.js
index e6cf7833950..b8423125837 100644
--- a/packages/zoe/src/contractFacet/zcfMint.js
+++ b/packages/zoe/src/contractFacet/zcfMint.js
@@ -8,7 +8,7 @@ import { assertFullIssuerRecord, makeIssuerRecord } from '../issuerRecord.js';
 import { addToAllocation, subtractFromAllocation } from './allocationMath.js';
 
 import '../internal-types.js';
-import { ZcfMintI } from '../typeGuards.js';
+import { ZcfMintI } from './typeGuards.js';
 import './internal-types.js';
 import './types-ambient.js';
 
diff --git a/packages/zoe/src/contractFacet/zcfZygote.js b/packages/zoe/src/contractFacet/zcfZygote.js
index 49384f0b8b4..fd6c0b335fd 100644
--- a/packages/zoe/src/contractFacet/zcfZygote.js
+++ b/packages/zoe/src/contractFacet/zcfZygote.js
@@ -10,7 +10,7 @@ import {
   provideDurableMapStore,
 } from '@agoric/vat-data';
 import { E } from '@endo/eventual-send';
-import { passStyleOf, Remotable } from '@endo/marshal';
+import { passStyleOf } from '@endo/pass-style';
 import { makePromiseKit } from '@endo/promise-kit';
 
 import { objectMap } from '@agoric/internal';
@@ -26,6 +26,7 @@ import { createSeatManager } from './zcfSeat.js';
 
 import { HandleOfferI, InvitationHandleShape } from '../typeGuards.js';
 import { prepareZcMint } from './zcfMint.js';
+import { ZcfI } from './typeGuards.js';
 
 /// <reference path="../internal-types.js" />
 /// <reference path="./internal-types.js" />
@@ -281,11 +282,7 @@ export const makeZCFZygote = async (
     ['canBeUpgraded', 'canUpgrade'].includes(meta.upgradability);
 
   /** @type {ZCF} */
-  // Using Remotable rather than Far because there are too many complications
-  // imposing checking wrappers: makeInvitation() and setJig() want to
-  // accept raw functions. assert cannot be a valid passable! (It's a function
-  // and has members.)
-  const zcf = Remotable('Alleged: zcf', undefined, {
+  const zcf = prepareExo(zcfBaggage, 'zcf', ZcfI, {
     atomicRearrange: transfers => seatManager.atomicRearrange(transfers),
     reallocate: (...seats) => seatManager.reallocate(...seats),
     assertUniqueKeyword: kwd => getInstanceRecHolder().assertUniqueKeyword(kwd),
diff --git a/packages/zoe/src/typeGuards.js b/packages/zoe/src/typeGuards.js
index e694725fc7b..7d2fd0664c3 100644
--- a/packages/zoe/src/typeGuards.js
+++ b/packages/zoe/src/typeGuards.js
@@ -144,17 +144,6 @@ export const ZoeMintI = M.interface('ZoeMint', {
   withdrawAndBurn: M.call(AmountShape).returns(),
 });
 
-export const ZcfMintI = M.interface('ZcfMint', {
-  getIssuerRecord: M.call().returns(IssuerRecordShape),
-  mintGains: M.call(AmountKeywordRecordShape)
-    .optional(M.remotable('zcfSeat'))
-    .returns(M.remotable('zcfSeat')),
-  burnLosses: M.call(
-    AmountKeywordRecordShape,
-    M.remotable('zcfSeat'),
-  ).returns(),
-});
-
 export const FeeMintAccessShape = M.remotable('FeeMintAccess');
 
 export const ExitObjectI = M.interface('Exit Object', {
diff --git a/packages/zoe/test/unitTests/zcf/zcf.test.js b/packages/zoe/test/unitTests/zcf/zcf.test.js
index 5f6900bb114..828d3757325 100644
--- a/packages/zoe/test/unitTests/zcf/zcf.test.js
+++ b/packages/zoe/test/unitTests/zcf/zcf.test.js
@@ -286,7 +286,8 @@ test(`zcf.makeInvitation - no description`, async t => {
   const { zcf } = await setupZCFTest();
   // @ts-expect-error deliberate invalid arguments for testing
   t.throws(() => zcf.makeInvitation(() => {}), {
-    message: 'invitations must have a description string: "[undefined]"',
+    message:
+      'In "makeInvitation" method of (zcf): Expected at least 2 arguments: ["<redacted raw arg>"]',
   });
 });
 
@@ -296,7 +297,8 @@ test(`zcf.makeInvitation - non-string description`, async t => {
   // https://github.com/Agoric/agoric-sdk/issues/1704
   // @ts-expect-error deliberate invalid arguments for testing
   t.throws(() => zcf.makeInvitation(() => {}, { something: 'a' }), {
-    message: /invitations must have a description string: .*/,
+    message:
+      'In "makeInvitation" method of (zcf): arg 1: copyRecord {"something":"a"} - Must be a string',
   });
 });