diff --git a/pkg/morph/client/notary.go b/pkg/morph/client/notary.go
index 1e80be921..dbd58a53a 100644
--- a/pkg/morph/client/notary.go
+++ b/pkg/morph/client/notary.go
@@ -58,16 +58,11 @@ const (
 	defaultNotaryValidTime = 50
 	defaultNotaryRoundTime = 100
 
-	notaryBalanceOfMethod    = "balanceOf"
-	notaryExpirationOfMethod = "expirationOf"
-	setDesignateMethod       = "designateAsRole"
+	setDesignateMethod = "designateAsRole"
 
-	notaryBalanceErrMsg      = "fetch notary balance"
 	notaryNotEnabledPanicMsg = "notary support was not enabled on this client"
 )
 
-var errUnexpectedItems = errors.New("invalid number of NEO VM arguments on stack")
-
 func defaultNotaryConfig(c *Client) *notaryCfg {
 	return &notaryCfg{
 		txValidTime:    defaultNotaryValidTime,
@@ -158,12 +153,13 @@ func (c *Client) DepositNotary(ctx context.Context, amount fixedn.Fixed8, delta
 		return util.Uint256{}, fmt.Errorf("get blockchain height: %w", err)
 	}
 
-	currentTill, err := c.depositExpirationOf()
+	r := notary.NewReader(c.rpcActor)
+	currentTill, err := r.ExpirationOf(c.acc.PrivateKey().GetScriptHash())
 	if err != nil {
 		return util.Uint256{}, fmt.Errorf("get previous expiration value: %w", err)
 	}
 
-	till := max(int64(bc+delta), currentTill)
+	till := max(int64(bc+delta), int64(currentTill))
 	res, _, err := c.depositNotary(ctx, amount, till)
 	return res, err
 }
@@ -237,18 +233,10 @@ func (c *Client) GetNotaryDeposit() (res int64, err error) {
 
 	sh := c.acc.PrivateKey().PublicKey().GetScriptHash()
 
-	items, err := c.TestInvoke(c.notary.notary, notaryBalanceOfMethod, sh)
+	r := notary.NewReader(c.rpcActor)
+	bigIntDeposit, err := r.BalanceOf(sh)
 	if err != nil {
-		return 0, fmt.Errorf("test invoke (%s): %w", notaryBalanceOfMethod, err)
-	}
-
-	if len(items) != 1 {
-		return 0, wrapFrostFSError(fmt.Errorf("%v: %w", notaryBalanceErrMsg, errUnexpectedItems))
-	}
-
-	bigIntDeposit, err := items[0].TryInteger()
-	if err != nil {
-		return 0, wrapFrostFSError(fmt.Errorf("%v: %w", notaryBalanceErrMsg, err))
+		return 0, fmt.Errorf("get notary deposit: %w", err)
 	}
 
 	return bigIntDeposit.Int64(), nil
@@ -651,24 +639,6 @@ func (c *Client) notaryTxValidationLimit() (uint32, error) {
 	return rounded, nil
 }
 
-func (c *Client) depositExpirationOf() (int64, error) {
-	expirationRes, err := c.TestInvoke(c.notary.notary, notaryExpirationOfMethod, c.acc.PrivateKey().GetScriptHash())
-	if err != nil {
-		return 0, fmt.Errorf("test invoke (%s): %w", notaryExpirationOfMethod, err)
-	}
-
-	if len(expirationRes) != 1 {
-		return 0, fmt.Errorf("method returned unexpected item count: %d", len(expirationRes))
-	}
-
-	currentTillBig, err := expirationRes[0].TryInteger()
-	if err != nil {
-		return 0, fmt.Errorf("parse deposit till value: %w", err)
-	}
-
-	return currentTillBig.Int64(), nil
-}
-
 // sigCount returns the number of required signature.
 // For FrostFS Alphabet M is a 2/3+1 of it (like in dBFT).
 // If committee is true, returns M as N/2+1.