diff --git a/audit/result.go b/audit/result.go
index 161c8c7..1ab836b 100644
--- a/audit/result.go
+++ b/audit/result.go
@@ -38,12 +38,7 @@ func (r *Result) Marshal() []byte {
 		r.versionEncoded = true
 	}
 
-	data, err := r.v2.StableMarshal(nil)
-	if err != nil {
-		panic(err)
-	}
-
-	return data
+	return r.v2.StableMarshal(nil)
 }
 
 var errCIDNotSet = errors.New("container ID is not set")
diff --git a/bearer/bearer.go b/bearer/bearer.go
index 4d54ea2..f24bb2e 100644
--- a/bearer/bearer.go
+++ b/bearer/bearer.go
@@ -224,14 +224,9 @@ func (b *Token) Sign(key ecdsa.PrivateKey) error {
 
 	m := (*acl.BearerToken)(b)
 
-	data, err := m.GetBody().StableMarshal(nil)
-	if err != nil {
-		return fmt.Errorf("marshal body: %w", err)
-	}
-
 	var sig neofscrypto.Signature
 
-	err = sig.Calculate(neofsecdsa.Signer(key), data)
+	err = sig.Calculate(neofsecdsa.Signer(key), m.GetBody().StableMarshal(nil))
 	if err != nil {
 		return fmt.Errorf("calculate signature: %w", err)
 	}
@@ -257,15 +252,10 @@ func (b Token) VerifySignature() error {
 		return errors.New("missing signature")
 	}
 
-	data, err := m.GetBody().StableMarshal(nil)
-	if err != nil {
-		return fmt.Errorf("marshal body: %w", err)
-	}
-
 	var sig neofscrypto.Signature
 	sig.ReadFromV2(*sigV2)
 
-	if !sig.Verify(data) {
+	if !sig.Verify(m.GetBody().StableMarshal(nil)) {
 		return errors.New("wrong signature")
 	}
 
@@ -312,14 +302,7 @@ func sanityCheck(b *Token) error {
 //
 // See also Unmarshal.
 func (b Token) Marshal() []byte {
-	v2 := (acl.BearerToken)(b)
-
-	data, err := v2.StableMarshal(nil)
-	if err != nil {
-		panic(err)
-	}
-
-	return data
+	return (*acl.BearerToken)(&b).StableMarshal(nil)
 }
 
 // Unmarshal unmarshals Token from canonical NeoFS binary format (proto3
diff --git a/client/container.go b/client/container.go
index be67260..9081677 100644
--- a/client/container.go
+++ b/client/container.go
@@ -84,14 +84,9 @@ func (c *Client) ContainerPut(ctx context.Context, prm PrmContainerPut) (*ResCon
 	// sign container
 	cnr := prm.cnr.ToV2()
 
-	data, err := cnr.StableMarshal(nil)
-	if err != nil {
-		return nil, fmt.Errorf("marshal container: %w", err)
-	}
-
 	var sig neofscrypto.Signature
 
-	err = sig.Calculate(neofsecdsa.SignerRFC6979(c.prm.key), data)
+	err := sig.Calculate(neofsecdsa.SignerRFC6979(c.prm.key), cnr.StableMarshal(nil))
 	if err != nil {
 		return nil, fmt.Errorf("calculate signature: %w", err)
 	}
@@ -675,14 +670,9 @@ func (c *Client) ContainerSetEACL(ctx context.Context, prm PrmContainerSetEACL)
 	// sign the eACL table
 	eaclV2 := prm.table.ToV2()
 
-	data, err := eaclV2.StableMarshal(nil)
-	if err != nil {
-		return nil, fmt.Errorf("marshal eACL: %w", err)
-	}
-
 	var sig neofscrypto.Signature
 
-	err = sig.Calculate(neofsecdsa.SignerRFC6979(c.prm.key), data)
+	err := sig.Calculate(neofsecdsa.SignerRFC6979(c.prm.key), eaclV2.StableMarshal(nil))
 	if err != nil {
 		return nil, fmt.Errorf("calculate signature: %w", err)
 	}
diff --git a/container/announcement.go b/container/announcement.go
index 0378abc..4b3d626 100644
--- a/container/announcement.go
+++ b/container/announcement.go
@@ -83,7 +83,7 @@ func (a *UsedSpaceAnnouncement) ToV2() *container.UsedSpaceAnnouncement {
 
 // Marshal marshals UsedSpaceAnnouncement into a protobuf binary form.
 func (a *UsedSpaceAnnouncement) Marshal() ([]byte, error) {
-	return a.ToV2().StableMarshal(nil)
+	return a.ToV2().StableMarshal(nil), nil
 }
 
 var errCIDNotSet = errors.New("container ID is not set")
diff --git a/container/container.go b/container/container.go
index 5c13e1f..dd65c24 100644
--- a/container/container.go
+++ b/container/container.go
@@ -88,13 +88,8 @@ func NewContainerFromV2(c *container.Container) *Container {
 // CalculateID calculates container identifier
 // based on its structure.
 func CalculateID(c *Container) cid.ID {
-	data, err := c.ToV2().StableMarshal(nil)
-	if err != nil {
-		panic(err)
-	}
-
 	var id cid.ID
-	id.SetSHA256(sha256.Sum256(data))
+	id.SetSHA256(sha256.Sum256(c.ToV2().StableMarshal(nil)))
 
 	return id
 }
@@ -194,7 +189,7 @@ func (c *Container) SetSignature(sig *neofscrypto.Signature) {
 
 // Marshal marshals Container into a protobuf binary form.
 func (c *Container) Marshal() ([]byte, error) {
-	return c.v2.StableMarshal(nil)
+	return c.v2.StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of Container.
diff --git a/eacl/filter.go b/eacl/filter.go
index 07eec68..12fac13 100644
--- a/eacl/filter.go
+++ b/eacl/filter.go
@@ -143,7 +143,7 @@ func NewFilterFromV2(filter *v2acl.HeaderFilter) *Filter {
 
 // Marshal marshals Filter into a protobuf binary form.
 func (f *Filter) Marshal() ([]byte, error) {
-	return f.ToV2().StableMarshal(nil)
+	return f.ToV2().StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of Filter.
diff --git a/eacl/record.go b/eacl/record.go
index 293755f..2d7861f 100644
--- a/eacl/record.go
+++ b/eacl/record.go
@@ -236,7 +236,7 @@ func NewRecordFromV2(record *v2acl.Record) *Record {
 
 // Marshal marshals Record into a protobuf binary form.
 func (r *Record) Marshal() ([]byte, error) {
-	return r.ToV2().StableMarshal(nil)
+	return r.ToV2().StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of Record.
diff --git a/eacl/table.go b/eacl/table.go
index cf3bbe4..962925c 100644
--- a/eacl/table.go
+++ b/eacl/table.go
@@ -180,7 +180,7 @@ func NewTableFromV2(table *v2acl.Table) *Table {
 
 // Marshal marshals Table into a protobuf binary form.
 func (t *Table) Marshal() ([]byte, error) {
-	return t.ToV2().StableMarshal(nil)
+	return t.ToV2().StableMarshal(nil), nil
 }
 
 var errCIDNotSet = errors.New("container ID is not set")
diff --git a/eacl/target.go b/eacl/target.go
index 84f62c0..768bbdc 100644
--- a/eacl/target.go
+++ b/eacl/target.go
@@ -125,7 +125,7 @@ func NewTargetFromV2(target *v2acl.Target) *Target {
 
 // Marshal marshals Target into a protobuf binary form.
 func (t *Target) Marshal() ([]byte, error) {
-	return t.ToV2().StableMarshal(nil)
+	return t.ToV2().StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of Target.
diff --git a/go.mod b/go.mod
index e8c5e67..92271f7 100644
--- a/go.mod
+++ b/go.mod
@@ -10,7 +10,7 @@ require (
 	github.com/mr-tron/base58 v1.2.0
 	github.com/nspcc-dev/hrw v1.0.9
 	github.com/nspcc-dev/neo-go v0.98.2
-	github.com/nspcc-dev/neofs-api-go/v2 v2.12.1
+	github.com/nspcc-dev/neofs-api-go/v2 v2.12.2-0.20220530190258-c82dcf7e1610
 	github.com/nspcc-dev/neofs-contract v0.15.1
 	github.com/nspcc-dev/tzhash v1.5.2
 	github.com/stretchr/testify v1.7.0
diff --git a/go.sum b/go.sum
index 30aad99..b093658 100644
--- a/go.sum
+++ b/go.sum
@@ -182,8 +182,8 @@ github.com/nspcc-dev/neo-go/pkg/interop v0.0.0-20220321113211-526c423a6152 h1:JK
 github.com/nspcc-dev/neo-go/pkg/interop v0.0.0-20220321113211-526c423a6152/go.mod h1:QBE0I30F2kOAISNpT5oks82yF4wkkUq3SCfI3Hqgx/Y=
 github.com/nspcc-dev/neofs-api-go/v2 v2.11.0-pre.0.20211201134523-3604d96f3fe1/go.mod h1:oS8dycEh8PPf2Jjp6+8dlwWyEv2Dy77h/XhhcdxYEFs=
 github.com/nspcc-dev/neofs-api-go/v2 v2.11.1/go.mod h1:oS8dycEh8PPf2Jjp6+8dlwWyEv2Dy77h/XhhcdxYEFs=
-github.com/nspcc-dev/neofs-api-go/v2 v2.12.1 h1:PVU2rLlG9S0jDe5eKyaUs4nKo/la+mN5pvz32Gib3qM=
-github.com/nspcc-dev/neofs-api-go/v2 v2.12.1/go.mod h1:73j09Xa7I2zQbM3HCvAHnDHPYiiWnEHa1d6Z6RDMBLU=
+github.com/nspcc-dev/neofs-api-go/v2 v2.12.2-0.20220530190258-c82dcf7e1610 h1:JwrxHWQJSOxx0LvnEvFj3MpKjWQAPXOq55uuGimghR0=
+github.com/nspcc-dev/neofs-api-go/v2 v2.12.2-0.20220530190258-c82dcf7e1610/go.mod h1:73j09Xa7I2zQbM3HCvAHnDHPYiiWnEHa1d6Z6RDMBLU=
 github.com/nspcc-dev/neofs-contract v0.15.1 h1:1r27t4SGKF7W1PRPOIfircEXHvALThNYNagT+SIabcA=
 github.com/nspcc-dev/neofs-contract v0.15.1/go.mod h1:kxO5ZTqdzFnRM5RMvM+Fhd+3GGrJo6AmG2ZyA9OCqqQ=
 github.com/nspcc-dev/neofs-crypto v0.2.0/go.mod h1:F/96fUzPM3wR+UGsPi3faVNmFlA9KAEAUQR7dMxZmNA=
diff --git a/netmap/filter.go b/netmap/filter.go
index 68e6c9e..0f33e2e 100644
--- a/netmap/filter.go
+++ b/netmap/filter.go
@@ -254,7 +254,7 @@ func (f *Filter) SetInnerFilters(fs ...Filter) {
 
 // Marshal marshals Filter into a protobuf binary form.
 func (f *Filter) Marshal() ([]byte, error) {
-	return (*netmap.Filter)(f).StableMarshal(nil)
+	return (*netmap.Filter)(f).StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of Filter.
diff --git a/netmap/network_info.go b/netmap/network_info.go
index 6234beb..7af240d 100644
--- a/netmap/network_info.go
+++ b/netmap/network_info.go
@@ -81,7 +81,7 @@ func (i *NetworkInfo) SetNetworkConfig(v *NetworkConfig) {
 
 // Marshal marshals NetworkInfo into a protobuf binary form.
 func (i *NetworkInfo) Marshal() ([]byte, error) {
-	return (*netmap.NetworkInfo)(i).StableMarshal(nil)
+	return (*netmap.NetworkInfo)(i).StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of NetworkInfo.
diff --git a/netmap/node_info.go b/netmap/node_info.go
index 040589f..2e4ba8d 100644
--- a/netmap/node_info.go
+++ b/netmap/node_info.go
@@ -274,7 +274,7 @@ func (a *NodeAttribute) SetParentKeys(keys ...string) {
 
 // Marshal marshals NodeAttribute into a protobuf binary form.
 func (a *NodeAttribute) Marshal() ([]byte, error) {
-	return (*netmap.Attribute)(a).StableMarshal(nil)
+	return (*netmap.Attribute)(a).StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of NodeAttribute.
@@ -401,7 +401,7 @@ func (i *NodeInfo) SetState(s NodeState) {
 
 // Marshal marshals NodeInfo into a protobuf binary form.
 func (i *NodeInfo) Marshal() ([]byte, error) {
-	return (*netmap.NodeInfo)(i).StableMarshal(nil)
+	return (*netmap.NodeInfo)(i).StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of NodeInfo.
diff --git a/netmap/policy.go b/netmap/policy.go
index aa1f336..a5ef032 100644
--- a/netmap/policy.go
+++ b/netmap/policy.go
@@ -139,7 +139,7 @@ func (p *PlacementPolicy) SetFilters(fs ...Filter) {
 
 // Marshal marshals PlacementPolicy into a protobuf binary form.
 func (p *PlacementPolicy) Marshal() ([]byte, error) {
-	return (*netmap.PlacementPolicy)(p).StableMarshal(nil)
+	return (*netmap.PlacementPolicy)(p).StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of PlacementPolicy.
diff --git a/netmap/replica.go b/netmap/replica.go
index 3535cc1..ddc0994 100644
--- a/netmap/replica.go
+++ b/netmap/replica.go
@@ -52,7 +52,7 @@ func (r *Replica) SetSelector(s string) {
 
 // Marshal marshals Replica into a protobuf binary form.
 func (r *Replica) Marshal() ([]byte, error) {
-	return (*netmap.Replica)(r).StableMarshal(nil)
+	return (*netmap.Replica)(r).StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of Replica.
diff --git a/netmap/selector.go b/netmap/selector.go
index 1dc6b0d..cec6d33 100644
--- a/netmap/selector.go
+++ b/netmap/selector.go
@@ -256,7 +256,7 @@ func (s *Selector) SetFilter(f string) {
 
 // Marshal marshals Selector into a protobuf binary form.
 func (s *Selector) Marshal() ([]byte, error) {
-	return (*netmap.Selector)(s).StableMarshal(nil)
+	return (*netmap.Selector)(s).StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of Selector.
diff --git a/object/attribute.go b/object/attribute.go
index cc1ac42..0e4ac9e 100644
--- a/object/attribute.go
+++ b/object/attribute.go
@@ -54,7 +54,7 @@ func (a *Attribute) ToV2() *object.Attribute {
 
 // Marshal marshals Attribute into a protobuf binary form.
 func (a *Attribute) Marshal() ([]byte, error) {
-	return (*object.Attribute)(a).StableMarshal(nil)
+	return (*object.Attribute)(a).StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of Attribute.
diff --git a/object/fmt.go b/object/fmt.go
index b893e8b..4339a04 100644
--- a/object/fmt.go
+++ b/object/fmt.go
@@ -55,13 +55,8 @@ func VerifyPayloadChecksum(obj *Object) error {
 
 // CalculateID calculates identifier for the object.
 func CalculateID(obj *Object) (oid.ID, error) {
-	data, err := obj.ToV2().GetHeader().StableMarshal(nil)
-	if err != nil {
-		return oid.ID{}, err
-	}
-
 	var id oid.ID
-	id.SetSHA256(sha256.Sum256(data))
+	id.SetSHA256(sha256.Sum256(obj.ToV2().GetHeader().StableMarshal(nil)))
 
 	return id, nil
 }
@@ -131,15 +126,10 @@ func (o *Object) VerifyIDSignature() bool {
 		return false
 	}
 
-	data, err := idV2.StableMarshal(nil)
-	if err != nil {
-		return false
-	}
-
 	var sig neofscrypto.Signature
 	sig.ReadFromV2(*sigV2)
 
-	return sig.Verify(data)
+	return sig.Verify(idV2.StableMarshal(nil))
 }
 
 // SetIDWithSignature sets object identifier and signature.
diff --git a/object/id/id.go b/object/id/id.go
index f9ccbe9..7df4e4f 100644
--- a/object/id/id.go
+++ b/object/id/id.go
@@ -132,7 +132,7 @@ func (id ID) Marshal() ([]byte, error) {
 	var v2 refs.ObjectID
 	v2.SetValue(id[:])
 
-	return v2.StableMarshal(nil)
+	return v2.StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of ID.
diff --git a/object/lock.go b/object/lock.go
index 4daff7e..ad93fa3 100644
--- a/object/lock.go
+++ b/object/lock.go
@@ -64,12 +64,7 @@ func (x *Lock) WriteMembers(ids []oid.ID) {
 
 // Marshal encodes the Lock into a NeoFS protocol binary format.
 func (x Lock) Marshal() []byte {
-	data, err := (*v2object.Lock)(&x).StableMarshal(nil)
-	if err != nil {
-		panic(err)
-	}
-
-	return data
+	return (*v2object.Lock)(&x).StableMarshal(nil)
 }
 
 // Unmarshal decodes the Lock from its NeoFS protocol binary representation.
diff --git a/object/object.go b/object/object.go
index 03c0b18..ada5ec7 100644
--- a/object/object.go
+++ b/object/object.go
@@ -593,7 +593,7 @@ func (o *Object) InitRelations() {
 
 // Marshal marshals object into a protobuf binary form.
 func (o *Object) Marshal() ([]byte, error) {
-	return (*object.Object)(o).StableMarshal(nil)
+	return (*object.Object)(o).StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of object.
diff --git a/object/splitinfo.go b/object/splitinfo.go
index 3fa262a..4e9039d 100644
--- a/object/splitinfo.go
+++ b/object/splitinfo.go
@@ -83,7 +83,7 @@ func (s *SplitInfo) SetLink(v oid.ID) {
 }
 
 func (s *SplitInfo) Marshal() ([]byte, error) {
-	return (*object.SplitInfo)(s).StableMarshal(nil)
+	return (*object.SplitInfo)(s).StableMarshal(nil), nil
 }
 
 func (s *SplitInfo) Unmarshal(data []byte) error {
diff --git a/object/tombstone.go b/object/tombstone.go
index 4f4ffac..f7ff3d5 100644
--- a/object/tombstone.go
+++ b/object/tombstone.go
@@ -103,7 +103,7 @@ func (t *Tombstone) SetMembers(v []oid.ID) {
 
 // Marshal marshals Tombstone into a protobuf binary form.
 func (t *Tombstone) Marshal() ([]byte, error) {
-	return (*tombstone.Tombstone)(t).StableMarshal(nil)
+	return (*tombstone.Tombstone)(t).StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of Tombstone.
diff --git a/reputation/peer.go b/reputation/peer.go
index 1edd2a6..d80d23a 100644
--- a/reputation/peer.go
+++ b/reputation/peer.go
@@ -64,7 +64,7 @@ func (x *PeerID) String() string {
 
 // Marshal marshals PeerID into a protobuf binary form.
 func (x *PeerID) Marshal() ([]byte, error) {
-	return (*reputation.PeerID)(x).StableMarshal(nil)
+	return (*reputation.PeerID)(x).StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of PeerID.
diff --git a/reputation/trust.go b/reputation/trust.go
index c0f3d40..4a73f75 100644
--- a/reputation/trust.go
+++ b/reputation/trust.go
@@ -77,7 +77,7 @@ func (x *Trust) Value() float64 {
 
 // Marshal marshals Trust into a protobuf binary form.
 func (x *Trust) Marshal() ([]byte, error) {
-	return (*reputation.Trust)(x).StableMarshal(nil)
+	return (*reputation.Trust)(x).StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of Trust.
@@ -150,7 +150,7 @@ func (x *PeerToPeerTrust) Trust() *Trust {
 
 // Marshal marshals PeerToPeerTrust into a protobuf binary form.
 func (x *PeerToPeerTrust) Marshal() ([]byte, error) {
-	return (*reputation.PeerToPeerTrust)(x).StableMarshal(nil)
+	return (*reputation.PeerToPeerTrust)(x).StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of PeerToPeerTrust.
@@ -271,14 +271,9 @@ func (x *GlobalTrust) Sign(key *ecdsa.PrivateKey) error {
 
 	m := (*reputation.GlobalTrust)(x)
 
-	data, err := m.GetBody().StableMarshal(nil)
-	if err != nil {
-		return fmt.Errorf("marshal body: %w", err)
-	}
-
 	var sig neofscrypto.Signature
 
-	err = sig.Calculate(neofsecdsa.Signer(*key), data)
+	err := sig.Calculate(neofsecdsa.Signer(*key), m.GetBody().StableMarshal(nil))
 	if err != nil {
 		return fmt.Errorf("calculate signature: %w", err)
 	}
@@ -301,15 +296,10 @@ func (x *GlobalTrust) VerifySignature() error {
 		return errors.New("missing signature")
 	}
 
-	data, err := m.GetBody().StableMarshal(nil)
-	if err != nil {
-		return fmt.Errorf("marshal body: %w", err)
-	}
-
 	var sig neofscrypto.Signature
 	sig.ReadFromV2(*sigV2)
 
-	if !sig.Verify(data) {
+	if !sig.Verify(m.GetBody().StableMarshal(nil)) {
 		return errors.New("wrong signature")
 	}
 
@@ -318,7 +308,7 @@ func (x *GlobalTrust) VerifySignature() error {
 
 // Marshal marshals GlobalTrust into a protobuf binary form.
 func (x *GlobalTrust) Marshal() ([]byte, error) {
-	return (*reputation.GlobalTrust)(x).StableMarshal(nil)
+	return (*reputation.GlobalTrust)(x).StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of GlobalTrust.
diff --git a/session/container.go b/session/container.go
index 88f3062..b5722d2 100644
--- a/session/container.go
+++ b/session/container.go
@@ -109,12 +109,7 @@ func (x Container) Marshal() []byte {
 	var m session.Token
 	x.WriteToV2(&m)
 
-	data, err := m.StableMarshal(nil)
-	if err != nil {
-		panic(fmt.Sprintf("unexpected error from Token.StableMarshal: %v", err))
-	}
-
-	return data
+	return m.StableMarshal(nil)
 }
 
 // Unmarshal decodes NeoFS API protocol binary format into the Container
@@ -181,12 +176,7 @@ func (x *Container) Sign(key ecdsa.PrivateKey) error {
 	x.body.SetLifetime(&x.lt)
 	x.body.SetContext(&x.c)
 
-	data, err := x.body.StableMarshal(nil)
-	if err != nil {
-		panic(fmt.Sprintf("unexpected error from Token.StableMarshal: %v", err))
-	}
-
-	return x.sig.Calculate(neofsecdsa.Signer(key), data)
+	return x.sig.Calculate(neofsecdsa.Signer(key), x.body.StableMarshal(nil))
 }
 
 // VerifySignature checks if Container signature is presented and valid.
@@ -196,12 +186,7 @@ func (x *Container) Sign(key ecdsa.PrivateKey) error {
 // See also Sign.
 func (x Container) VerifySignature() bool {
 	// TODO: (#233) check owner<->key relation
-	data, err := x.body.StableMarshal(nil)
-	if err != nil {
-		panic(fmt.Sprintf("unexpected error from Token.StableMarshal: %v", err))
-	}
-
-	return x.sig.Verify(data)
+	return x.sig.Verify(x.body.StableMarshal(nil))
 }
 
 // ApplyOnlyTo limits session scope to a given author container.
diff --git a/session/object.go b/session/object.go
index 5c5a8a6..7b7f6dd 100644
--- a/session/object.go
+++ b/session/object.go
@@ -112,12 +112,7 @@ func (x Object) Marshal() []byte {
 	var m session.Token
 	x.WriteToV2(&m)
 
-	data, err := m.StableMarshal(nil)
-	if err != nil {
-		panic(fmt.Sprintf("unexpected error from Token.StableMarshal: %v", err))
-	}
-
-	return data
+	return m.StableMarshal(nil)
 }
 
 // Unmarshal decodes NeoFS API protocol binary format into the Object
@@ -184,12 +179,7 @@ func (x *Object) Sign(key ecdsa.PrivateKey) error {
 	x.body.SetLifetime(&x.lt)
 	x.body.SetContext(&x.c)
 
-	data, err := x.body.StableMarshal(nil)
-	if err != nil {
-		panic(fmt.Sprintf("unexpected error from Token.StableMarshal: %v", err))
-	}
-
-	return x.sig.Calculate(neofsecdsa.Signer(key), data)
+	return x.sig.Calculate(neofsecdsa.Signer(key), x.body.StableMarshal(nil))
 }
 
 // VerifySignature checks if Object signature is presented and valid.
@@ -199,12 +189,7 @@ func (x *Object) Sign(key ecdsa.PrivateKey) error {
 // See also Sign.
 func (x Object) VerifySignature() bool {
 	// TODO: (#233) check owner<->key relation
-	data, err := x.body.StableMarshal(nil)
-	if err != nil {
-		panic(fmt.Sprintf("unexpected error from Token.StableMarshal: %v", err))
-	}
-
-	return x.sig.Verify(data)
+	return x.sig.Verify(x.body.StableMarshal(nil))
 }
 
 // BindContainer binds the Object session to a given container. Each session
diff --git a/storagegroup/storagegroup.go b/storagegroup/storagegroup.go
index 5d35822..a14bd0a 100644
--- a/storagegroup/storagegroup.go
+++ b/storagegroup/storagegroup.go
@@ -156,8 +156,7 @@ func (sg *StorageGroup) SetMembers(members []oid.ID) {
 //
 // See also Unmarshal.
 func (sg StorageGroup) Marshal() ([]byte, error) {
-	v2 := (storagegroup.StorageGroup)(sg)
-	return v2.StableMarshal(nil)
+	return (*storagegroup.StorageGroup)(&sg).StableMarshal(nil), nil
 }
 
 // Unmarshal unmarshals protobuf binary representation of StorageGroup.
diff --git a/subnet/id/id.go b/subnet/id/id.go
index d1f530c..9a198df 100644
--- a/subnet/id/id.go
+++ b/subnet/id/id.go
@@ -67,7 +67,7 @@ func (x *ID) String() string {
 
 // Marshal encodes ID into a binary format of NeoFS API V2 protocol (Protocol Buffers with direct field order).
 func (x *ID) Marshal() ([]byte, error) {
-	return (*refs.SubnetID)(x).StableMarshal(nil)
+	return (*refs.SubnetID)(x).StableMarshal(nil), nil
 }
 
 // Unmarshal decodes ID from NeoFS API V2 binary format (see Marshal). Must not be called on nil.
diff --git a/subnet/subnet.go b/subnet/subnet.go
index 75c48c9..fd295ab 100644
--- a/subnet/subnet.go
+++ b/subnet/subnet.go
@@ -26,7 +26,7 @@ func (x Info) WriteToV2(msg *subnet.Info) {
 
 // Marshal encodes Info into a binary format of NeoFS API V2 protocol (Protocol Buffers with direct field order).
 func (x *Info) Marshal() ([]byte, error) {
-	return (*subnet.Info)(x).StableMarshal(nil)
+	return (*subnet.Info)(x).StableMarshal(nil), nil
 }
 
 // Unmarshal decodes Info from NeoFS API V2 binary format (see Marshal). Must not be called on nil.