diff --git a/es/ae/aens.js b/es/ae/aens.js
index 9419d5febb..da772755a7 100644
--- a/es/ae/aens.js
+++ b/es/ae/aens.js
@@ -28,8 +28,9 @@
 
 import * as R from 'ramda'
 import { encodeBase58Check, salt } from '../utils/crypto'
-import { commitmentHash } from '../tx/builder/helpers'
+import { commitmentHash, isNameValid } from '../tx/builder/helpers'
 import Ae from './'
+import { CLIENT_TTL, NAME_TTL } from '../tx/builder/schema'
 
 /**
  * Transfer a domain to another account
@@ -132,6 +133,7 @@ async function update (nameId, target, options = {}) {
  * @return {Promise<Object>}
  */
 async function query (name, opt = {}) {
+  isNameValid(name)
   const o = await this.getName(name)
   const nameId = o.id
 
@@ -165,6 +167,7 @@ async function query (name, opt = {}) {
  * @return {Promise<Object>} the result of the claim
  */
 async function claim (name, salt, options = {}) {
+  isNameValid(name)
   const opt = R.merge(this.Ae.defaults, options)
   const claimTx = await this.nameClaimTx(R.merge(opt, {
     accountId: await this.address(opt),
@@ -173,11 +176,8 @@ async function claim (name, salt, options = {}) {
   }))
 
   const result = await this.send(claimTx, opt)
-
-  return {
-    ...result,
-    ...opt.waitMined && await this.aensQuery(name, opt)
-  }
+  const nameInter = this.Chain.defaults.waitMined ? await this.aensQuery(name, opt) : {}
+  return Object.assign(result, nameInter)
 }
 
 /**
@@ -190,6 +190,7 @@ async function claim (name, salt, options = {}) {
  * @return {Promise<Object>}
  */
 async function preclaim (name, options = {}) {
+  isNameValid(name)
   const opt = R.merge(this.Ae.defaults, options)
   const _salt = salt()
   const height = await this.height()
@@ -234,8 +235,8 @@ const Aens = Ae.compose({
   deepProps: {
     Ae: {
       defaults: {
-        clientTtl: 1,
-        nameTtl: 50000 // aec_governance:name_claim_max_expiration() => 50000
+        clientTtl: CLIENT_TTL,
+        nameTtl: NAME_TTL // aec_governance:name_claim_max_expiration() => 50000
       }
     }
   }
diff --git a/es/ae/index.js b/es/ae/index.js
index bb74446258..3b12da9dba 100644
--- a/es/ae/index.js
+++ b/es/ae/index.js
@@ -29,6 +29,8 @@ import Account from '../account'
 import TxBuilder from '../tx/builder'
 import * as R from 'ramda'
 import { BigNumber } from 'bignumber.js'
+import { isAddressValid } from '../utils/crypto'
+import { isNameValid } from '../tx/builder/helpers'
 
 /**
  * Sign and post a transaction to the chain
@@ -63,16 +65,36 @@ async function signUsingGA (tx, options = {}) {
  * @category async
  * @rtype (amount: Number|String, recipientId: String, options?: Object) => Promise[String]
  * @param {Number|String} amount - Amount to spend
- * @param {String} recipientId - Address of recipient account
+ * @param {String} recipientId - Address or Name of recipient account
  * @param {Object} options - Options
  * @return {String|String} Transaction or transaction hash
  */
 async function spend (amount, recipientId, options = {}) {
   const opt = R.merge(this.Ae.defaults, options)
-  const spendTx = await this.spendTx(R.merge(opt, { senderId: await this.address(opt), recipientId, amount: amount }))
+  recipientId = await this.resolveRecipientName(recipientId)
+  const spendTx = await this.spendTx(R.merge(opt, { senderId: await this.address(opt), recipientId, amount }))
   return this.send(spendTx, opt)
 }
 
+/**
+ * Resolve AENS name and return name hash
+ *
+ * @param {String} nameOrAddress
+ * @param {String} pointerPrefix
+ * @return {String} Address or AENS name hash
+ */
+async function resolveRecipientName (nameOrAddress) {
+  if (isAddressValid(nameOrAddress)) return nameOrAddress
+  if (isNameValid(nameOrAddress)) {
+    const { id } = await this.getName(nameOrAddress)
+    return id
+  }
+  // Validation
+  // const { id: nameHash, pointers } = await this.getName(nameOrAddress)
+  // if (pointers.find(({ id }) => id.split('_')[0] === pointerPrefix)) return nameHash
+  // throw new Error(`Can't find pointers with prefix ${pointerPrefix} for name ${nameOrAddress}`)
+}
+
 /**
  * Send a percentage of funds to another account
  * @instance
@@ -135,7 +157,7 @@ function destroyInstance () {
  * @return {Object} Ae instance
  */
 const Ae = stampit(Tx, Account, Chain, {
-  methods: { send, spend, transferFunds, destroyInstance },
+  methods: { send, spend, transferFunds, destroyInstance, resolveRecipientName },
   deepProps: { Ae: { defaults: {} } }
   // Todo Enable GA
   // deepConfiguration: { Ae: { methods: ['signUsingGA'] } }
diff --git a/es/tx/builder/helpers.js b/es/tx/builder/helpers.js
index 0d1f6f3c32..dc149c5b1f 100644
--- a/es/tx/builder/helpers.js
+++ b/es/tx/builder/helpers.js
@@ -1,3 +1,4 @@
+import * as R from 'ramda'
 import {
   assertedType,
   decodeBase58Check,
@@ -8,7 +9,7 @@ import {
   salt
 } from '../../utils/crypto'
 import { toBytes } from '../../utils/bytes'
-import { ID_TAG_PREFIX, PREFIX_ID_TAG } from './schema'
+import { ID_TAG_PREFIX, PREFIX_ID_TAG, AENS_NAME_DOMAINS } from './schema'
 import { BigNumber } from 'bignumber.js'
 
 /**
@@ -205,6 +206,20 @@ export function readPointers (pointers) {
   )
 }
 
+/**
+ * Is name valid
+ * @function
+ * @alias module:@aeternity/aepp-sdk/es/ae/aens
+ * @param {string} name
+ * @return Boolean
+ * @throws Error
+ */
+export function isNameValid (name) {
+  if (typeof name !== 'string') throw new Error('AENS: Name must be a string')
+  if (!AENS_NAME_DOMAINS.includes(R.last(name.split('.')))) throw new Error(`AENS: Invalid name domain. Possible domains [${AENS_NAME_DOMAINS}]`)
+  return true
+}
+
 export default {
   readPointers,
   buildPointers,
@@ -219,5 +234,6 @@ export default {
   formatSalt,
   oracleQueryId,
   createSalt,
-  buildHash
+  buildHash,
+  isNameValid
 }
diff --git a/es/tx/builder/index.js b/es/tx/builder/index.js
index beb2635232..1e32e77bfc 100644
--- a/es/tx/builder/index.js
+++ b/es/tx/builder/index.js
@@ -141,6 +141,10 @@ function validateField (value, key, type, prefix) {
       return assert((!isNaN(value) || BigNumber.isBigNumber(value)) && BigNumber(value).gte(0), { value, isMinusValue })
     }
     case FIELD_TYPES.id:
+      if (Array.isArray(prefix)) {
+        const p = prefix.find(p => p === value.split('_')[0])
+        return assert(p && PREFIX_ID_TAG[value.split('_')[0]], { value, prefix })
+      }
       return assert(assertedType(value, prefix) && PREFIX_ID_TAG[value.split('_')[0]] && value.split('_')[0] === prefix, { value, prefix })
     case FIELD_TYPES.binary:
       return assert(value.split('_')[0] === prefix, { prefix, value })
diff --git a/es/tx/builder/schema.js b/es/tx/builder/schema.js
index 8ece8f1727..0fdf886c81 100644
--- a/es/tx/builder/schema.js
+++ b/es/tx/builder/schema.js
@@ -11,6 +11,12 @@
 import BigNumber from 'bignumber.js'
 
 export const VSN = 1
+export const VSN_2 = 2
+
+// # AENS
+export const AENS_NAME_DOMAINS = ['aet', 'test']
+export const CLIENT_TTL = 1
+export const NAME_TTL = 50000
 
 // # Tag constant for ids (type uint8)
 // # see https://github.com/aeternity/protocol/blob/master/serializations.md#the-id-type
@@ -374,14 +380,14 @@ const ACCOUNT_TX_2 = [
   TX_FIELD('flags', FIELD_TYPES.int),
   TX_FIELD('nonce', FIELD_TYPES.int),
   TX_FIELD('balance', FIELD_TYPES.int),
-  TX_FIELD('gaContract', FIELD_TYPES.id, 'ct'),
+  TX_FIELD('gaContract', FIELD_TYPES.id, ['ct', 'nm']),
   TX_FIELD('gaAuthFun', FIELD_TYPES.binary, 'cb')
 ]
 
 const SPEND_TX = [
   ...BASE_TX,
   TX_FIELD('senderId', FIELD_TYPES.id, 'ak'),
-  TX_FIELD('recipientId', FIELD_TYPES.id, 'ak'),
+  TX_FIELD('recipientId', FIELD_TYPES.id, ['ak', 'nm']),
   TX_FIELD('amount', FIELD_TYPES.int),
   TX_FIELD('fee', FIELD_TYPES.int),
   TX_FIELD('ttl', FIELD_TYPES.int),
@@ -431,7 +437,7 @@ const NAME_TRANSFER_TX = [
   TX_FIELD('accountId', FIELD_TYPES.id, 'ak'),
   TX_FIELD('nonce', FIELD_TYPES.int),
   TX_FIELD('nameId', FIELD_TYPES.id, 'nm'),
-  TX_FIELD('recipientId', FIELD_TYPES.id, 'ak'),
+  TX_FIELD('recipientId', FIELD_TYPES.id, ['ak', 'nm']),
   TX_FIELD('fee', FIELD_TYPES.int),
   TX_FIELD('ttl', FIELD_TYPES.int)
 ]
@@ -501,7 +507,7 @@ const CONTRACT_CALL_TX = [
   ...BASE_TX,
   TX_FIELD('callerId', FIELD_TYPES.id, 'ak'),
   TX_FIELD('nonce', FIELD_TYPES.int),
-  TX_FIELD('contractId', FIELD_TYPES.id, 'ct'),
+  TX_FIELD('contractId', FIELD_TYPES.id, ['ct', 'nm']),
   TX_FIELD('abiVersion', FIELD_TYPES.int),
   TX_FIELD('fee', FIELD_TYPES.int),
   TX_FIELD('ttl', FIELD_TYPES.int),
@@ -541,7 +547,7 @@ const ORACLE_REGISTER_TX = [
 
 const ORACLE_EXTEND_TX = [
   ...BASE_TX,
-  TX_FIELD('oracleId', FIELD_TYPES.id, 'ok'),
+  TX_FIELD('oracleId', FIELD_TYPES.id, ['ok', 'nm']),
   TX_FIELD('nonce', FIELD_TYPES.int),
   TX_FIELD('oracleTtlType', FIELD_TYPES.int),
   TX_FIELD('oracleTtlValue', FIELD_TYPES.int),
@@ -553,7 +559,7 @@ const ORACLE_QUERY_TX = [
   ...BASE_TX,
   TX_FIELD('senderId', FIELD_TYPES.id, 'ak'),
   TX_FIELD('nonce', FIELD_TYPES.int),
-  TX_FIELD('oracleId', FIELD_TYPES.id, 'ok'),
+  TX_FIELD('oracleId', FIELD_TYPES.id, ['ok', 'nm']),
   TX_FIELD('query', FIELD_TYPES.string),
   TX_FIELD('queryFee', FIELD_TYPES.int),
   TX_FIELD('queryTtlType', FIELD_TYPES.int),
diff --git a/test/integration/aens.js b/test/integration/aens.js
index f88165b3c2..ce32c929c1 100644
--- a/test/integration/aens.js
+++ b/test/integration/aens.js
@@ -30,6 +30,7 @@ describe('Aens', function () {
   configure(this)
 
   let aens
+  let nameHash
   const account = generateKeyPair()
   const name = randomName()
 
@@ -68,12 +69,19 @@ describe('Aens', function () {
 
   it('updates names', async () => {
     const claim = await aens.aensQuery(name)
+    nameHash = claim.id
     const address = await aens.address()
     return claim.update(address).should.eventually.deep.include({
       pointers: [R.fromPairs([['key', 'account_pubkey'], ['id', address]])]
     })
   })
 
+  it('Spend by name', async () => {
+    const current = await aens.address()
+    const onAccount = aens.addresses().find(acc => acc !== current)
+    await aens.spend(100, name, { onAccount })
+  })
+
   it('transfers names', async () => {
     const claim = await aens.aensQuery(name)