diff --git a/packages/server/src/models/ManualJournal.ts b/packages/server/src/models/ManualJournal.ts
index e4380acb8..3d25b377f 100644
--- a/packages/server/src/models/ManualJournal.ts
+++ b/packages/server/src/models/ManualJournal.ts
@@ -96,7 +96,7 @@ export default class ManualJournal extends mixin(TenantModel, [
   static get relationMappings() {
     const AccountTransaction = require('models/AccountTransaction');
     const ManualJournalEntry = require('models/ManualJournalEntry');
-    const ManualJournal = require('models/ManualJournal');
+    const Document = require('models/Document');
 
     return {
       entries: {
@@ -127,7 +127,7 @@ export default class ManualJournal extends mixin(TenantModel, [
        */
       attachments: {
         relation: Model.ManyToManyRelation,
-        modelClass: ManualJournal.default,
+        modelClass: Document.default,
         join: {
           from: 'manual_journals.id',
           through: {
diff --git a/packages/webapp/src/containers/Import/ImportDropzoneFile.tsx b/packages/webapp/src/containers/Import/ImportDropzoneFile.tsx
index 2cec9242f..c37c5d78f 100644
--- a/packages/webapp/src/containers/Import/ImportDropzoneFile.tsx
+++ b/packages/webapp/src/containers/Import/ImportDropzoneFile.tsx
@@ -1,17 +1,22 @@
 // @ts-nocheck
 import { useRef } from 'react';
 import { Button, Intent } from '@blueprintjs/core';
+import clsx from 'classnames';
 import { Box, Icon, Stack } from '@/components';
 import { Dropzone, DropzoneProps } from '@/components/Dropzone';
 import { MIME_TYPES } from '@/components/Dropzone/mine-types';
-import styles from './ImportDropzone.module.css';
 import { useUncontrolled } from '@/hooks/useUncontrolled';
+import styles from './ImportDropzone.module.css';
 
 interface ImportDropzoneFieldProps {
   initialValue?: File;
   value?: File;
   onChange?: (file: File) => void;
   dropzoneProps?: DropzoneProps;
+  uploadIcon?: JSX.Element;
+  title?: string;
+  subtitle?: string;
+  classNames?: Record<string, string>;
 }
 
 export function ImportDropzoneField({
@@ -19,6 +24,10 @@ export function ImportDropzoneField({
   value,
   onChange,
   dropzoneProps,
+  uploadIcon = <Icon icon="download" iconSize={26} />,
+  title = 'Drag images here or click to select files',
+  subtitle = 'Drag and Drop file here or Choose file',
+  classNames,
 }: ImportDropzoneFieldProps) {
   const [localValue, handleChange] = useUncontrolled({
     value,
@@ -38,15 +47,18 @@ export function ImportDropzoneField({
       onReject={(files) => console.log('rejected files', files)}
       maxSize={5 * 1024 ** 2}
       accept={[MIME_TYPES.csv, MIME_TYPES.xls, MIME_TYPES.xlsx]}
-      classNames={{ content: styles.dropzoneContent }}
+      classNames={{ root: classNames?.root, content: styles.dropzoneContent }}
       activateOnClick={false}
       openRef={openRef}
       {...dropzoneProps}
     >
-      <Stack spacing={12} align="center" className={styles.content}>
-        <Box className={styles.iconWrap}>
-          <Icon icon="download" iconSize={26} />
-        </Box>
+      <Stack
+        spacing={12}
+        align="center"
+        className={clsx(styles.content, classNames?.content)}
+      >
+        {uploadIcon && <Box className={styles.iconWrap}>{uploadIcon}</Box>}
+
         {localValue ? (
           <Stack spacing={6} justify="center" align="center">
             <h4 className={styles.title}>{localValue.name}</h4>
@@ -56,15 +68,10 @@ export function ImportDropzoneField({
           </Stack>
         ) : (
           <Stack spacing={4} align="center">
-            <h4 className={styles.title}>
-              Drag images here or click to select files
-            </h4>
-            <span className={styles.subtitle}>
-              Drag and Drop file here or Choose file
-            </span>
+            {title && <h4 className={styles.title}>{title}</h4>}
+            {subtitle && <span className={styles.subtitle}>{subtitle}</span>}
           </Stack>
         )}
-
         <Button
           intent="none"
           onClick={() => openRef.current?.()}
diff --git a/packages/webapp/src/containers/Sales/Invoices/InvoiceForm/InvoiceFormFooter.tsx b/packages/webapp/src/containers/Sales/Invoices/InvoiceForm/InvoiceFormFooter.tsx
index 7f2d0d6f1..23e7b7cef 100644
--- a/packages/webapp/src/containers/Sales/Invoices/InvoiceForm/InvoiceFormFooter.tsx
+++ b/packages/webapp/src/containers/Sales/Invoices/InvoiceForm/InvoiceFormFooter.tsx
@@ -7,6 +7,7 @@ import { CLASSES } from '@/constants/classes';
 import { Paper, Row, Col } from '@/components';
 import { InvoiceFormFooterLeft } from './InvoiceFormFooterLeft';
 import { InvoiceFormFooterRight } from './InvoiceFormFooterRight';
+import { UploadAttachmentButton } from './UploadAttachmentButton';
 
 export default function InvoiceFormFooter() {
   return (
@@ -15,6 +16,7 @@ export default function InvoiceFormFooter() {
         <Row>
           <Col md={8}>
             <InvoiceFormFooterLeft />
+            <UploadAttachmentButton />
           </Col>
 
           <Col md={4}>
diff --git a/packages/webapp/src/containers/Sales/Invoices/InvoiceForm/UploadAttachmentButton.module.scss b/packages/webapp/src/containers/Sales/Invoices/InvoiceForm/UploadAttachmentButton.module.scss
new file mode 100644
index 000000000..f1ccd5a93
--- /dev/null
+++ b/packages/webapp/src/containers/Sales/Invoices/InvoiceForm/UploadAttachmentButton.module.scss
@@ -0,0 +1,18 @@
+
+.popover :global .bp4-popover-content{
+  min-width: 450px;
+}
+
+
+.attachmentButton:not([class*=bp4-intent-]) {
+  &,
+  &:hover{
+    background-color: #fff;
+  }
+  border: 1px solid rgb(206, 212, 218);
+}
+
+.attachmentField :global .bp4-label{
+  font-weight: 500;
+  font-size: 12px;
+}
\ No newline at end of file
diff --git a/packages/webapp/src/containers/Sales/Invoices/InvoiceForm/UploadAttachmentButton.tsx b/packages/webapp/src/containers/Sales/Invoices/InvoiceForm/UploadAttachmentButton.tsx
new file mode 100644
index 000000000..d9d0fbc4b
--- /dev/null
+++ b/packages/webapp/src/containers/Sales/Invoices/InvoiceForm/UploadAttachmentButton.tsx
@@ -0,0 +1,55 @@
+// @ts-nocheck
+import clsx from 'classnames';
+import { Field, useFormikContext } from 'formik';
+import {
+  Button,
+  Classes,
+  Popover,
+  PopoverInteractionKind,
+} from '@blueprintjs/core';
+import { FFormGroup } from '@/components';
+import { UploadAttachmentsPopoverContent } from './UploadAttachmentsPopoverContent';
+import styles from './UploadAttachmentButton.module.scss';
+
+function UploadAttachmentButtonButtonContentField() {
+  return (
+    <Field name={'attachments'}>
+      {({ form: { setFieldValue }, field: { value } }) => (
+        <UploadAttachmentsPopoverContent
+          value={value}
+          onChange={(value) => {
+            setFieldValue('attachments', value);
+          }}
+        />
+      )}
+    </Field>
+  );
+}
+
+export function UploadAttachmentButton() {
+  const { values } = useFormikContext();
+  const uploadedFiles = values?.attachments?.length || 0;
+
+  return (
+    <FFormGroup
+      name={'attachments'}
+      label={'Attachments'}
+      className={styles.attachmentField}
+    >
+      <Popover
+        interactionKind={PopoverInteractionKind.CLICK}
+        popoverClassName={clsx(styles.popover, Classes.POPOVER_CONTENT_SIZING)}
+        placement={'top-start'}
+        content={<UploadAttachmentButtonButtonContentField />}
+      >
+        <Button className={styles.attachmentButton}>
+          {uploadedFiles > 0 ? (
+            <>Upload attachments ({uploadedFiles})</>
+          ) : (
+            <>Upload attachments</>
+          )}
+        </Button>
+      </Popover>
+    </FFormGroup>
+  );
+}
diff --git a/packages/webapp/src/containers/Sales/Invoices/InvoiceForm/UploadAttachmentPopoverContent.module.scss b/packages/webapp/src/containers/Sales/Invoices/InvoiceForm/UploadAttachmentPopoverContent.module.scss
new file mode 100644
index 000000000..6753ccaaa
--- /dev/null
+++ b/packages/webapp/src/containers/Sales/Invoices/InvoiceForm/UploadAttachmentPopoverContent.module.scss
@@ -0,0 +1,49 @@
+
+.content {
+}
+
+.hintText{
+  display: flex;
+  font-size: 12px;
+  margin-top: 6px;
+  color: #8F99A8;
+  justify-content: space-between;
+}
+
+.attachments{
+  margin-top: 12px;
+}
+
+.attachmentItem{
+  border: 1px solid #D3D8DE;
+  border-radius: 3px;
+  padding: 6px 10px;
+  justify-content: space-between;
+}
+
+.attachmentFilenameText{
+  color: #404854;
+}
+
+.attachmentSizeText{
+  font-size: 12px;
+  color: #738091;
+}
+
+.attachmentContent{
+  padding-left: 8px;
+}
+
+.attachmentIcon{
+  color: #8F99A8;
+}
+
+.label{
+  font-size: 12px;
+  margin-bottom: 4px;
+}
+
+.dropzoneRoot{
+  min-height: 140px;
+  padding: 10px;
+}
diff --git a/packages/webapp/src/containers/Sales/Invoices/InvoiceForm/UploadAttachmentsPopoverContent.tsx b/packages/webapp/src/containers/Sales/Invoices/InvoiceForm/UploadAttachmentsPopoverContent.tsx
new file mode 100644
index 000000000..3973cd7ba
--- /dev/null
+++ b/packages/webapp/src/containers/Sales/Invoices/InvoiceForm/UploadAttachmentsPopoverContent.tsx
@@ -0,0 +1,193 @@
+// @ts-nocheck
+import { useState } from 'react';
+import { isEmpty } from 'lodash';
+import { Button, Intent, Text, Spinner } from '@blueprintjs/core';
+import { Box, Group, Icon, Stack } from '@/components';
+import { ImportDropzoneField } from '@/containers/Import/ImportDropzoneFile';
+import { useUncontrolled } from '@/hooks/useUncontrolled';
+import {
+  useDeleteAttachment,
+  useUploadAttachments,
+} from '@/hooks/query/attachments';
+import { formatBytes } from './utils';
+import styles from './UploadAttachmentPopoverContent.module.scss';
+
+interface AttachmentFileCommon {
+  originName: string;
+  key: string;
+  size: number;
+  mimeType: string;
+}
+interface AttachmentFileLoaded extends AttachmentFileCommon {}
+interface AttachmentFileLoading extends AttachmentFileCommon {
+  _loading: boolean;
+}
+type AttachmentFile = AttachmentFileLoaded | AttachmentFileLoading;
+
+interface UploadAttachmentsPopoverContentProps {
+  initialValue?: AttachmentFile[];
+  value?: AttachmentFile[];
+  onChange?: (value: AttachmentFile[]) => void;
+}
+
+/**
+ * Uploads and list the attachments with ability to delete particular attachment.
+ * @param {UploadAttachmentsPopoverContentProps}
+ */
+export function UploadAttachmentsPopoverContent({
+  initialValue,
+  value,
+  onChange,
+}: UploadAttachmentsPopoverContentProps) {
+  // Controlled/uncontrolled value state.
+  const [localFiles, handleFilesChange] = useUncontrolled<AttachmentFile[]>({
+    finalValue: [],
+    initialValue,
+    value,
+    onChange: onChange,
+  });
+  // Stops loading of the given attachment key and updates it to new key,
+  // that came from the server-side after uploading is done.
+  const stopLoadingAttachment = (
+    localFiles: AttachmentFile[],
+    internalKey: string,
+    newKey: string,
+  ) => {
+    return localFiles.map((localFile) => {
+      if (localFile.key === internalKey) {
+        return {
+          ...localFile,
+          key: newKey,
+          _loading: false,
+        };
+      }
+      return localFile;
+    });
+  };
+  // Uploads the attachments.
+  const { mutateAsync: uploadAttachments } = useUploadAttachments({
+    onSuccess: (data, variables, context) => {
+      const newLocalFiles = stopLoadingAttachment(
+        localFiles,
+        data.config.data.get('internalKey'),
+        data.data.data.key,
+      );
+      handleFilesChange(newLocalFiles);
+    },
+  });
+  // Deletes the attachment.
+  const { mutateAsync: deleteAttachment } = useDeleteAttachment();
+
+  // Deletes the attachment of the given file key.
+  const DeleteButton = ({ fileKey }: { fileKey: string }) => {
+    const [loading, setLoading] = useState<boolean>(false);
+
+    const handleClick = () => {
+      setLoading(true);
+      deleteAttachment(fileKey).then(() => {
+        const updatedFiles = localFiles.filter(
+          (file, i) => file.key !== fileKey,
+        );
+        handleFilesChange(updatedFiles);
+        setLoading(false);
+      });
+    };
+    return (
+      <Button
+        small
+        minimal
+        intent={Intent.DANGER}
+        loading={loading}
+        disabled={loading}
+        onClick={handleClick}
+      >
+        <Icon icon={'trash-16'} iconSize={16} />
+      </Button>
+    );
+  };
+  // Handle change dropzone.
+  const handleChangeDropzone = (file: File) => {
+    const formData = new FormData();
+    const key = Date.now().toString();
+
+    formData.append('file', file);
+    formData.append('internalKey', key);
+
+    handleFilesChange([
+      {
+        originName: file.name,
+        size: file.size,
+        key,
+        _loading: true,
+      },
+      ...localFiles,
+    ]);
+    uploadAttachments(formData);
+  };
+
+  return (
+    <div className={styles.content}>
+      <div>
+        <Text className={styles.label}>Attach documents</Text>
+        <Stack spacing={0}>
+          <ImportDropzoneField
+            uploadIcon={null}
+            value={null}
+            title={''}
+            classNames={{ root: styles.dropzoneRoot }}
+            onChange={handleChangeDropzone}
+          />
+          <Group className={styles.hintText}>
+            <Box>Formats: CSV, XLSX</Box>
+            <Box>Maximum: 25MB</Box>
+          </Group>
+        </Stack>
+
+        {!isEmpty(localFiles) && (
+          <Stack spacing={8} className={styles.attachments}>
+            {localFiles.map((localFile: AttachmentFile, index: number) => (
+              <Group
+                position={'space-between'}
+                className={styles.attachmentItem}
+                key={index}
+              >
+                <Group spacing={16} className={styles.attachmentContent}>
+                  {localFile._loading ? (
+                    <Spinner size={20} />
+                  ) : (
+                    <Icon
+                      icon={'media'}
+                      iconSize={16}
+                      className={styles.attachmentIcon}
+                    />
+                  )}
+                  <Stack spacing={2}>
+                    <Text className={styles.attachmentFilenameText}>
+                      {localFile.originName}
+                    </Text>
+                    {localFile._loading ? (
+                      <Text>Loading...</Text>
+                    ) : (
+                      <Text className={styles.attachmentSizeText}>
+                        {formatBytes(localFile.size)}
+                      </Text>
+                    )}
+                  </Stack>
+                </Group>
+
+                {!localFile._loading && (
+                  <Group spacing={0}>
+                    <Button small minimal>
+                      View
+                    </Button>
+                    <DeleteButton fileKey={localFile.key} />
+                  </Group>
+                )}
+              </Group>
+            ))}
+          </Stack>
+        )}
+      </div>
+    </div>
+  );
+}
diff --git a/packages/webapp/src/hooks/query/attachments.ts b/packages/webapp/src/hooks/query/attachments.ts
new file mode 100644
index 000000000..a9a40972c
--- /dev/null
+++ b/packages/webapp/src/hooks/query/attachments.ts
@@ -0,0 +1,31 @@
+// @ts-nocheck
+import { useMutation } from 'react-query';
+import useApiRequest from '../useRequest';
+
+const commonInvalidateQueries = (query) => {
+  // Invalidate accounts.
+};
+
+/**
+ * Uploads the given attachments.
+ */
+export function useUploadAttachments(props) {
+  const apiRequest = useApiRequest();
+
+  return useMutation(
+    (values) => apiRequest.post('/attachments', values),
+    props,
+  );
+}
+
+/**
+ * Deletes the given attachment key.
+ */
+export function useDeleteAttachment(props) {
+  const apiRequest = useApiRequest();
+
+  return useMutation(
+    (key: string) => apiRequest.delete(`/attachments/${key}`),
+    props,
+  );
+}
diff --git a/packages/webapp/src/static/json/icons.tsx b/packages/webapp/src/static/json/icons.tsx
index 95cdbd46a..0e6d27c62 100644
--- a/packages/webapp/src/static/json/icons.tsx
+++ b/packages/webapp/src/static/json/icons.tsx
@@ -578,26 +578,30 @@ export default {
     viewBox: '0 0 20 20',
   },
   done: {
-    path: [
-      'M395-285 226-455l50-50 119 118 289-288 50 51-339 339Z',
-    ],
-    viewBox: '0 -960 960 960'
+    path: ['M395-285 226-455l50-50 119 118 289-288 50 51-339 339Z'],
+    viewBox: '0 -960 960 960',
   },
   download: {
     path: [
-      'M480-336 288-528l51-51 105 105v-342h72v342l105-105 51 51-192 192ZM263.717-192Q234-192 213-213.15T192-264v-72h72v72h432v-72h72v72q0 29.7-21.162 50.85Q725.676-192 695.96-192H263.717Z'
+      'M480-336 288-528l51-51 105 105v-342h72v342l105-105 51 51-192 192ZM263.717-192Q234-192 213-213.15T192-264v-72h72v72h432v-72h72v72q0 29.7-21.162 50.85Q725.676-192 695.96-192H263.717Z',
     ],
-    viewBox: '0 -960 960 960'
+    viewBox: '0 -960 960 960',
   },
   'chevron-up': {
     path: [
-      'M12.71,9.29l-4-4C8.53,5.11,8.28,5,8,5S7.47,5.11,7.29,5.29l-4,4C3.11,9.47,3,9.72,3,10c0,0.55,0.45,1,1,1c0.28,0,0.53-0.11,0.71-0.29L8,7.41l3.29,3.29C11.47,10.89,11.72,11,12,11c0.55,0,1-0.45,1-1C13,9.72,12.89,9.47,12.71,9.29'
+      'M12.71,9.29l-4-4C8.53,5.11,8.28,5,8,5S7.47,5.11,7.29,5.29l-4,4C3.11,9.47,3,9.72,3,10c0,0.55,0.45,1,1,1c0.28,0,0.53-0.11,0.71-0.29L8,7.41l3.29,3.29C11.47,10.89,11.72,11,12,11c0.55,0,1-0.45,1-1C13,9.72,12.89,9.47,12.71,9.29',
     ],
     viewBox: '0 0 16 16',
   },
   'chevron-down': {
     path: [
-      'M12,5c-0.28,0-0.53,0.11-0.71,0.29L8,8.59L4.71,5.29C4.53,5.11,4.28,5,4,5C3.45,5,3,5.45,3,6c0,0.28,0.11,0.53,0.29,0.71l4,4C7.47,10.89,7.72,11,8,11s0.53-0.11,0.71-0.29l4-4C12.89,6.53,13,6.28,13,6C13,5.45,12.55,5,12,5z'
+      'M12,5c-0.28,0-0.53,0.11-0.71,0.29L8,8.59L4.71,5.29C4.53,5.11,4.28,5,4,5C3.45,5,3,5.45,3,6c0,0.28,0.11,0.53,0.29,0.71l4,4C7.47,10.89,7.72,11,8,11s0.53-0.11,0.71-0.29l4-4C12.89,6.53,13,6.28,13,6C13,5.45,12.55,5,12,5z',
+    ],
+    viewBox: '0 0 16 16',
+  },
+  media: {
+    path: [
+      'M11.99,6.99c0.55,0,1-0.45,1-1s-0.45-1-1-1s-1,0.45-1,1S11.44,6.99,11.99,6.99zM14.99,1.99h-14c-0.55,0-1,0.45-1,1v10c0,0.55,0.45,1,1,1h14c0.55,0,1-0.45,1-1v-10C15.99,2.44,15.54,1.99,14.99,1.99zM13.99,10.99l-5-3l-1,2l-3-4l-3,5v-7h12V10.99z',
     ],
     viewBox: '0 0 16 16',
   },