and/or

In several english-speaking countries, slash (/) is a slang term. The term and/or denotes that both can happen and often leads to confusion and ambiguity. Although, MSTP accepts this style, writers can elaborate it for more clarity based on context.
Example:

1. Your name and/or password is incorrect.
2. Police told,"You will be charged $150 and/or 15 days jail."

Better: Police told,"You will be charged $150 or 15 days jail or both."