In Retail Express although you can add illegal characters in the web interface, these characters will generate errors when doing any Mass uploading or downloading

So For SKU’s you can only use the following:

a-zA-Z0-9/+-._


Any other characters should not be used.


For Description's commas “,” and back slashes “\” are not permitted


There was a release late in 2019 where the characters and symbols that can be used with retail express was adjusted, some reports were having errors do the to characters. Please find the link below of the new valid ones. 


Valid characters for Retail Express fields


Retail Express only allows certain characters and symbols in various fields within the system. If you try to use a character other than these, you may encounter an error. Typically, non-valid characters are referred to as "illegal characters". 

To see details for specific fields, please refer to the table below.

FieldCharacter
Supplier SKU*

Alphanumeric (a-z, A-Z, 0-9)

Underscore _

hyphen - 

forward slash /

plus + 

period/full stop .

Manufacturer SKU*

Alphanumeric, with a maximum of 20 characters (a-z, A-Z, 0-9)

Descriptions*

Outlet Names

Alphanumeric (a-z, A-Z, 0-9)

Not allowed: 

Quotes "

Apostrophes ' 

Back slash \

Forward slash /

Non-western characters

Attributes*

Alphanumeric (a-z, A-Z, 0-9)

Underscore _

Hyphen -

Forward slash /

Plus + 

Period/full stop .

XML

If using XML through the API integrations, you will need to ensure that your fields do not contain: 

Less than <

More than > 

Any special characters e.g. ¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ

* These restrictions also apply when updating these fields via Mass Upload