Outsiders will in many instances not make this distinction and will link the matter to Shell. Whenever you make or receive payments or give or receive a gift associated in a private capacity, this can give rise to expectations in the person involved, if you subsequently have contact with them in your capacity as an employee. Prevent gifts, payments, entertainment or benefits from making you dependent on those involved. So, say no to the giving or receiving of gifts, payments, entertainment or benefits if this does not take place publicly or is not spoken about publicly. Immerse yourself in the local customs for the giving or receiving of gifts, payments, entertainment or benefits.
Customs regarding tips and fees differ depending on the culture.
Whenever a tip is customary and this is fair reward for a genuine service, that is acceptable. Tips are given after the service has been received not before. Only gifts or entertainment of little value should be used to support a working relationship. Special occasions can be a justification for more valuable presents or entertainment. This could be a present for an anniversary or entertainment for an official opening.