diff --git a/backend/src/graphql/resolver/UserResolver.ts b/backend/src/graphql/resolver/UserResolver.ts
index 2dc571901..14be59307 100644
--- a/backend/src/graphql/resolver/UserResolver.ts
+++ b/backend/src/graphql/resolver/UserResolver.ts
@@ -1172,7 +1172,7 @@ export async function findUserByEmail(email: string): Promise<DbUser> {
     return dbUser
   } catch (e) {
     const logger = createLogger()
-    if (e instanceof EntityNotFoundError) {
+    if (e instanceof EntityNotFoundError || (e as Error).name === 'EntityNotFoundError') {
       // TODO: discuss if it is ok to print email in log for this case
       logger.warn(`findUserByEmail failed, user with email=${email} not found`)
     } else {
diff --git a/backend/src/graphql/resolver/util/processXComSendCoins.ts b/backend/src/graphql/resolver/util/processXComSendCoins.ts
index 7115d3d1f..572a50f97 100644
--- a/backend/src/graphql/resolver/util/processXComSendCoins.ts
+++ b/backend/src/graphql/resolver/util/processXComSendCoins.ts
@@ -70,7 +70,7 @@ export async function processXComPendingSendCoins(
 
     const receiverFCom = await DbFederatedCommunity.findOneOrFail({
       where: {
-        publicKey: receiverCom.publicKey,
+        publicKey: Buffer.from(receiverCom.publicKey),
         apiVersion: CONFIG.FEDERATION_BACKEND_SEND_ON_API,
       },
     })
@@ -194,7 +194,7 @@ export async function processXComCommittingSendCoins(
       logger.debug('find pending Tx for settlement:', pendingTx)
       const receiverFCom = await DbFederatedCommunity.findOneOrFail({
         where: {
-          publicKey: receiverCom.publicKey,
+          publicKey: Buffer.from(receiverCom.publicKey),
 
           apiVersion: CONFIG.FEDERATION_BACKEND_SEND_ON_API,
         },